mb/amd/onyx: Use BMC SOL by default

Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Change-Id: Iefe61d25367bbe5cff0cacbfbafa32607de77d0f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76509
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/mainboard/amd/onyx/Kconfig

@@ -16,4 +16,8 @@ config MAINBOARD_DIR
 config MAINBOARD_PART_NUMBER
 	default "Onyx"
 
+# Use BMC SOL console on SoC UART1 by default
+config UART_FOR_CONSOLE
+	default 1
+
 endif