Patch for linux-6.3

[ziman]

This is just a small change on top of #209 that makes the driver compile on linux-6.3. Most of the diff comes from #209 and my only change is this: 39baac1

I'm not sure if 0 is the right value for the extra parameter but the driver seems to work with it.

[rrafal1337]

It seems that there is driver shipped with kernel 6.3.5 and it works with my hardware.

[Wed Jun  7 03:28:30 2023] usb 1-2: new high-speed USB device number 4 using xhci_hcd
[Wed Jun  7 03:28:30 2023] usb 1-2: New USB device found, idVendor=0bda, idProduct=c811, bcdDevice= 2.00
[Wed Jun  7 03:28:30 2023] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[Wed Jun  7 03:28:30 2023] usb 1-2: Product: 802.11ac NIC
[Wed Jun  7 03:28:30 2023] usb 1-2: Manufacturer: Realtek
[Wed Jun  7 03:28:30 2023] usb 1-2: SerialNumber: 123456
[Wed Jun  7 03:28:30 2023] rtw_8821cu 1-2:1.0: Firmware version 24.11.0, H2C version 12
[Wed Jun  7 03:28:30 2023] usbcore: registered new interface driver rtw_8821cu
[Wed Jun  7 03:28:30 2023] rtw_8821cu 1-2:1.0 wlp4s0f3u2: renamed from wlan0

rru04@seagull ~ 11:58:57 $ modinfo rtw88_8821cu
filename:       /lib/modules/6.3.5-200.fc38.x86_64/kernel/drivers/net/wireless/realtek/rtw88/rtw88_8821cu.ko.xz
license:        Dual BSD/GPL
description:    Realtek 802.11ac wireless 8821cu driver
author:         Hans Ulli Kroll <[email protected]>
alias:          usb:v0BDAp2006d*dc*dsc*dp*icFFiscFFipFFin*
alias:          usb:v0BDAp8811d*dc*dsc*dp*icFFiscFFipFFin*
alias:          usb:v0BDApC811d*dc*dsc*dp*icFFiscFFipFFin*
alias:          usb:v0BDApC82Bd*dc*dsc*dp*icFFiscFFipFFin*
alias:          usb:v0BDApC82Ad*dc*dsc*dp*icFFiscFFipFFin*
alias:          usb:v0BDApC820d*dc*dsc*dp*icFFiscFFipFFin*
alias:          usb:v0BDApC821d*dc*dsc*dp*icFFiscFFipFFin*
alias:          usb:v0BDApB820d*dc*dsc*dp*icFFiscFFipFFin*
alias:          usb:v0BDApB82Bd*dc*dsc*dp*icFFiscFFipFFin*
depends:        rtw88_usb,rtw88_8821c
retpoline:      Y
intree:         Y
name:           rtw88_8821cu
vermagic:       6.3.5-200.fc38.x86_64 SMP preempt mod_unload 
sig_id:         PKCS#7
signer:         Fedora kernel signing key
sig_key:        76:77:D2:CA:8C:0A:B7:A7:39:59:A2:B0:7A:5A:E2:61:10:CB:E7:D0
sig_hashalgo:   sha256
signature:      42:80:9C:8B:79:B8:CC:1B:E7:A0:40:00:8E:5B:8E:61:8B:25:DD:6B:
		77:51:4C:54:39:13:A2:47:B7:89:FB:7B:DE:D1:34:A6:FF:33:AA:A3:
		EE:9A:81:54:8A:A2:16:47:76:28:A6:87:69:EF:B8:BA:68:D7:EE:2D:
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		F5:DE:AF:F0:2D:3C:00:97:0D:82:04:D4:D1:AD:50:8E:62:3D:6A:43:
		8F:BE:16:1F:20:59:0E:7A:03:FB:4C:8D:A5:C2:43:98:E1:D3:9A:18:
		FB:52:45:48:4F:8E:96:65:A4:F6:42:92:93:A3:A2:61:AB:83:D3:CA:
		0E:CC:28:47:C8:54:E8:9E:8A:56:47:99:BC:69:47:6D:1C:F3:E6:48:
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		5C:17:1C:DA:40:E7:B9:59:51:91:9D:C5:B8:B6:71:A4:7F:99:8D:27:
		5D:F9:DD:9A:D7:AB:E3:7B:0F:90:9D:14:46:A9:81:48:0E:DB:11:CB:
		CD:03:70:C9:6D:07:92:1C:10:5D:97:7D:AB:E7:CE:4A:6C:51:6F:A0:
		24:D3:A9:15:3E:6F:EA:18:B5:C0:95:0D

So it means now cards based on rtl8821cu chip will work out of the box on latest kernels.