Fix SSID bug on Cypress Targets

[balajicyp]

Summary of changes

Fix SSID bug on Cypress Targets

This changes is required to fix an issue when SSID length is 32 bytes long then only 31 bytes are copied
into SSID name causing WiFi association failure.

Impact of changes

This change is limited to only Cypress Target boards.

Migration actions required

Documentation

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Pull request type

[x] Patch update (Bug fix / Target update / Docs update / Test update / Refactor)
[] Feature update (New feature / Functionality change / New API)
[] Major update (Breaking change E.g. Return code change / API behaviour change)

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Test results

The fix is tested by changing the SSID length to 32 bytes and checking for WiFi Association. The MBED-OS example is modified
to SSID length of 32 bytes and tested for WiFi Connection and IP address ( https://github.com/ARMmbed/mbed-os-example-wifi)
[] No Tests required for this change (E.g docs only update)
[x] Covered by existing mbed-os tests (Greentea or Unittest)
[] Tests / results supplied as part of this PR

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Reviewers

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[ciarmcom]

@balajicyp, thank you for your changes.
@ARMmbed/mbed-os-maintainers please review.

[balajicyp]

I have tested using MBED OS wifi example from https://github.com/ARMmbed/mbed-os-example-wifi
changed SSID in mbed_app.json to "abcedfghijklmnopqrstuvwxyzABCDEF" and with this change able to connect to WiFi and get IP address.

LOG

Mbed OS version 6.2.1

Scan:
WLAN MAC Address : C4:AC:59:7B:5D:DC
WLAN Firmware : wl0: Jan 30 2020 21:41:53 version 7.45.98.95 (r724303 CY) FWID 01-5afc8c1e
WLAN CLM : API: 12.2 Data: 9.10.39 Compiler: 1.29.4 ClmImport: 1.36.3 Creation: 2020-01-30 21:30:05
WHD VERSION : v1.91.2 : v1.91.2 : GCC 9.3 : 2020-06-25 02:15:47 -0500
Network: ATT080 secured: Unknown BSSID: C0:A0:D:25:ee:0 RSSI: -53 Ch: 1
Network: ATTkmegea2 secured: Unknown BSSID: C:EA:C9:a2:83:80 RSSI: -82 Ch: 1
Network: ATT4tzf4dx secured: Unknown BSSID: E0:22:4:7c:7b:85 RSSI: -90 Ch: 1
Network: universe secured: Unknown BSSID: 70:4F:57:e2:f2:db RSSI: -88 Ch: 1
Network: Irn Bru secured: Unknown BSSID: 6C:B0:CE:b2:7b:3 RSSI: -71 Ch: 4
Network: NETGEAR45 secured: Unknown BSSID: CC:40:D0:6:6d:16 RSSI: -72 Ch: 6
Network: DIRECT-3F-HP OfficeJet Pro 8720 secured: Unknown BSSID: 18:60:24:e:b8:44 RSSI: -97 Ch: 6
Network: WolfeNet secured: Unknown BSSID: 7E:D2:94:35:e8:35 RSSI: -70 Ch: 6
Network: secured: Unknown BSSID: 12:2:8E:a4:8c:43 RSSI: -78 Ch: 6
Network: WolfeNet secured: Unknown BSSID: E:2:8E:a4:8c:43 RSSI: -81 Ch: 6
Network: abcedfghijklmnopqrstuvwxyzABCDEF secured: Unknown BSSID: 3C:37:86:fb:ed:f7 RSSI: -24 Ch: 7
Network: NETGEAR28 secured: Unknown BSSID: 28:80:88:1c:ce:c2 RSSI: -71 Ch: 10
Network: Home123 secured: Unknown BSSID: C:54:A5:cf:ac:c0 RSSI: -76 Ch: 11
Network: secured: Unknown BSSID: 16:E:83:bf:8f:54 RSSI: -83 Ch: 11
Network: Bobo secured: Unknown BSSID: F4:E:83:bf:8f:54 RSSI: -84 Ch: 11
15 networks available.

Connecting to abcedfghijklmnopqrstuvwxyzABCDEF...
Success

MAC: c4:ac:59:7b:5d:dc
IP: 192.165.100.16
Netmask: 255.255.255.0
Gateway: 192.165.100.1
RSSI: -24

Done

Without Patch getting error below are the LOGS

LOGS without patch

Mbed OS version 6.2.1

Scan:
WLAN MAC Address : C4:AC:59:7B:5D:DC
WLAN Firmware : wl0: Jan 30 2020 21:41:53 version 7.45.98.95 (r724303 CY) FWID 01-5afc8c1e
WLAN CLM : API: 12.2 Data: 9.10.39 Compiler: 1.29.4 ClmImport: 1.36.3 Creation: 2020-01-30 21:30:05
WHD VERSION : v1.91.2 : v1.91.2 : GCC 9.3 : 2020-06-25 02:15:47 -0500
Network: DIRECT-A0-HP OfficeJet 3830 secured: WPA2 BSSID: 38:22:E2:4e:c8:a1 RSSI: -84 Ch: 1
Network: jacky_EXT secured: WEP BSSID: 28:C6:8E:89:c0:20 RSSI: -93 Ch: 1
Network: ATT080 secured: Unknown BSSID: C0:A0:D:25:ee:0 RSSI: -50 Ch: 1
Network: universe secured: Unknown BSSID: 70:4F:57:e2:f2:db RSSI: -82 Ch: 1
Network: secured: Unknown BSSID: 84:16:F9:6d:21:24 RSSI: -83 Ch: 3
Network: Irn Bru secured: Unknown BSSID: 6C:B0:CE:b2:7b:3 RSSI: -68 Ch: 4
Network: HP-Print-DD-Officejet Pro 8600 secured: Unknown BSSID: 44:1E:A1:e9:60:dd RSSI: -92 Ch: 4
Network: NETGEAR45 secured: Unknown BSSID: CC:40:D0:6:6d:16 RSSI: -75 Ch: 6
Network: secured: Unknown BSSID: 12:2:8E:a4:8c:43 RSSI: -74 Ch: 6
Network: WolfeNet secured: Unknown BSSID: 7E:D2:94:35:e8:35 RSSI: -68 Ch: 6
Network: WolfeGuest secured: Unknown BSSID: 86:D2:94:35:e8:35 RSSI: -68 Ch: 6
Network: WolfeNet secured: Unknown BSSID: E:2:8E:a4:8c:43 RSSI: -74 Ch: 6
Network: abcedfghijklmnopqrstuvwxyzABCDEF secured: Unknown BSSID: 3C:37:86:fb:ed:f7 RSSI: -26 Ch: 7
Network: NETGEAR28 secured: Unknown BSSID: 28:80:88:1c:ce:c2 RSSI: -73 Ch: 10
14 networks available.

Connecting to abcedfghijklmnopqrstuvwxyzABCDEF...

Connection error: -3008

[0xc0170]

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