Fix rp2xxx UART0_TX available pins #205

Job	Run time
Dry Run Packaging	1m 37s
Build (ubuntu-latest)	28s
Build Examples (espressif/esp)	2m 7s
Build (windows-latest)	1m 6s
Build Website	20s
Build (macos-latest)	27s
Build Examples (gigadevice/gd32)	2m 26s
Check that stm32 generated code is up to date	38s
Build Examples (microchip/avr)	2m 20s
Build Examples (microchip/atsam)	1m 58s
Unit Test Ports (ubuntu-latest, gigadevice/gd32)	17s
Build Examples (nordic/nrf5x)	2m 7s
Unit Test Regz (ubuntu-latest)	18s
Unit Test Ports (ubuntu-latest, raspberrypi/rp2xxx)	25s
Unit Test UF2 (ubuntu-latest)	21s
Build Examples (nxp/lpc)	2m 4s
Unit Test Regz (windows-latest)	1m 30s
Unit Test Ports (ubuntu-latest, stmicro/stm32)	26s
Unit Test UF2 (windows-latest)	1m 20s
Unit Test Regz (macos-latest)	27s
Unit Test Ports (windows-latest, gigadevice/gd32)	2m 3s
Build Examples (stmicro/stm32)	17s
Unit Test UF2 (macos-latest)	19s
Unit Test Ports (windows-latest, raspberrypi/rp2xxx)	2m 4s
Build Examples (raspberrypi/rp2xxx)	2m 15s
Unit Test Ports (windows-latest, stmicro/stm32)	1m 46s
Build Examples (wch/ch32v)	2m 14s
Unit Test Ports (macos-latest, gigadevice/gd32)	32s
Unit Test Ports (macos-latest, raspberrypi/rp2xxx)	34s
Unit Test Ports (macos-latest, stmicro/stm32)	45s
	35m 31s

Provide feedback