feat (uart): uses the same IDF 32bits size for TX/RX buffers

Uses the same IDF 32bits size for TX/RX buffers.

Changed header files to use the same IDF buffer limits.
* this is a backport from PR #9554

Author: SuGlider

Diff for: cores/esp32/esp32-hal-uart.h

@@ -29,8 +29,8 @@ extern "C" {
 struct uart_struct_t;
 typedef struct uart_struct_t uart_t;
 
-bool _testUartBegin(uint8_t uart_nr, uint32_t baudrate, uint32_t config, int8_t rxPin, int8_t txPin, uint16_t rx_buffer_size, uint16_t tx_buffer_size, bool inverted, uint8_t rxfifo_full_thrhd);
-uart_t* uartBegin(uint8_t uart_nr, uint32_t baudrate, uint32_t config, int8_t rxPin, int8_t txPin, uint16_t rx_buffer_size, uint16_t tx_buffer_size, bool inverted, uint8_t rxfifo_full_thrhd);
+bool _testUartBegin(uint8_t uart_nr, uint32_t baudrate, uint32_t config, int8_t rxPin, int8_t txPin, uint32_t rx_buffer_size, uint32_t tx_buffer_size, bool inverted, uint8_t rxfifo_full_thrhd);
+uart_t* uartBegin(uint8_t uart_nr, uint32_t baudrate, uint32_t config, int8_t rxPin, int8_t txPin, uint32_t rx_buffer_size, uint32_t tx_buffer_size, bool inverted, uint8_t rxfifo_full_thrhd);
 void uartEnd(uint8_t uart_num);
 
 // This is used to retrieve the Event Queue pointer from a UART IDF Driver in order to allow user to deal with its events