Merge pull request #3927 from raspberrypi/update-uart-pi5

Update enable_uart with explicit baudrate

Author: nathan-contino

documentation/asciidoc/computers/config_txt/boot.adoc

@@ -86,7 +86,7 @@ If `disable_splash` is set to `1`, the rainbow splash screen will not be shown o
 
 === `enable_uart`
 
-`enable_uart=1` (in conjunction with `console=serial0` in `cmdline.txt`) requests that the kernel creates a serial console, accessible using GPIOs 14 and 15 (pins 8 and 10 on the 40-pin header). Editing `cmdline.txt` to remove the line `quiet` enables boot messages from the kernel to also appear there. See also `uart_2ndstage`.
+`enable_uart=1` (in conjunction with `console=serial0,115200` in `cmdline.txt`) requests that the kernel creates a serial console, accessible using GPIOs 14 and 15 (pins 8 and 10 on the 40-pin header). Editing `cmdline.txt` to remove the line `quiet` enables boot messages from the kernel to also appear there. See also `uart_2ndstage`.
 
 === `force_eeprom_read`