Enable PS/2 keyboard in coreboot config

Signed-off-by: Thomas Clarke <tonux@riseup.net>

Author: Tonux599

config/coreboot-msi_z790p_ddr5.config

@@ -642,7 +642,7 @@ CONFIG_INTEL_GMA_OPREGION_2_1=y
 CONFIG_INTEL_GMA_VERSION_2=y
 CONFIG_HAVE_INTEL_PTT=y
 # CONFIG_DRIVERS_NXP_UWB_SR1XX is not set
-# CONFIG_DRIVERS_PS2_KEYBOARD is not set
+CONFIG_DRIVERS_PS2_KEYBOARD=y
 CONFIG_DRIVERS_MC146818=y
 CONFIG_USE_PC_CMOS_ALTCENTURY=y
 CONFIG_PC_CMOS_BASE_PORT_BANK0=0x70