esp32: different espShow declarations, use uint16_t

[PBrunot]

When compiling with -flto=auto for esp32-s2 platform, the following mistake comes out (2 different declarations for same function with parameter 1 argument type difference)

.pio/libdeps/wokwi/Adafruit NeoPixel/Adafruit_NeoPixel.cpp:390:17: warning: type of 'espShow' does not match original declaration [-Wlto-type-mismatch]
390 | extern "C" void espShow(uint16_t pin, uint8_t *pixels, uint32_t numBytes,
| ^
.pio/libdeps/wokwi/Adafruit NeoPixel/esp.c:37:6: note: type mismatch in parameter 1
37 | void espShow(uint8_t pin, uint8_t *pixels, uint32_t numBytes, boolean is800KHz) {
| ^
.pio/libdeps/wokwi/Adafruit NeoPixel/esp.c:37:6: note: type 'uint8_t' should match type 'uint16_t'
.pio/libdeps/wokwi/Adafruit NeoPixel/esp.c:37:6: note: 'espShow' was previously declared here

• Conflicts is between esp.c and Adafruit_NeoPixel.cpp definitions

• Suggest fix is to change esp.c to accept uint16_t, because it will be anyways promoted to int in rmtInit()/rmtWrite() functions.

void espShow(uint8_t pin, uint8_t *pixels, uint32_t numBytes, boolean is800KHz)
void espShow(uint16_t pin, uint8_t *pixels, uint32_t numBytes, boolean is800KHz)

• After this change warning disappear. I can send you a PR if you wish.