Unify UART headers (#24855)

* Remove deprecated defines

* Move default config to .c files

* Unify UART headers

* Clean up docs

* Reorganise PAL mode defaults

platforms/chibios/drivers/uart_sio.c

@@ -3,6 +3,73 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "uart.h"
+#include "gpio.h"
+#include "chibios_config.h"
+#include <hal.h>
+
+#ifndef UART_DRIVER
+#    define UART_DRIVER SIOD1
+#endif
+
+#ifndef UART_TX_PIN
+#    define UART_TX_PIN A9
+#endif
+
+#ifndef UART_TX_PAL_MODE
+#    ifdef USE_GPIOV1
+#        define UART_TX_PAL_MODE PAL_MODE_ALTERNATE_PUSHPULL
+#    else
+#        define UART_TX_PAL_MODE 7
+#    endif
+#endif
+
+#ifndef UART_RX_PIN
+#    define UART_RX_PIN A10
+#endif
+
+#ifndef UART_RX_PAL_MODE
+#    ifdef USE_GPIOV1
+#        define UART_RX_PAL_MODE PAL_MODE_INPUT
+#    else
+#        define UART_RX_PAL_MODE 7
+#    endif
+#endif
+
+#ifndef UART_CTS_PIN
+#    define UART_CTS_PIN A11
+#endif
+
+#ifndef UART_CTS_PAL_MODE
+#    ifdef USE_GPIOV1
+#        define UART_CTS_PAL_MODE PAL_MODE_INPUT
+#    else
+#        define UART_CTS_PAL_MODE 7
+#    endif
+#endif
+
+#ifndef UART_RTS_PIN
+#    define UART_RTS_PIN A12
+#endif
+
+#ifndef UART_RTS_PAL_MODE
+#    ifdef USE_GPIOV1
+#        define UART_RTS_PAL_MODE PAL_MODE_ALTERNATE_PUSHPULL
+#    else
+#        define UART_RTS_PAL_MODE 7
+#    endif
+#endif
+
+#ifndef UART_CR1
+#    define UART_CR1 0
+#endif
+
+#ifndef UART_CR2
+#    define UART_CR2 0
+#endif
+
+#ifndef UART_CR3
+#    define UART_CR3 0
+#endif
 
 #if defined(MCU_RP)
 // 38400 baud, 8 data bits, 1 stop bit, no parity, no flow control