meta-mchp-polarfire-soc: conf: machine: set SERIAL_CONSOLES in mpfs-disco-kit

Set the SERIAL_CONSOLES variable in the mpfs-disco-kit machine to use
ttyS1 by default.

Signed-off-by: Valentina Fernandez <valentina.fernandezalanis@microchip.com>

Author: vfalanis

meta-mchp-polarfire-soc/meta-mchp-polarfire-soc-bsp/conf/machine/mpfs-disco-kit.conf

@@ -15,6 +15,8 @@ UBOOT_MACHINE = "microchip_mpfs_discokit_defconfig"
 
 IMAGE_INSTALL:remove = " dt-overlay-mchp"
 
+SERIAL_CONSOLES = "115200;ttyS1"
+
 ## Generate a boot.scr file which should be included
 ##  in the boot partition. It will try to load a kernel image from mmc
 UBOOT_ENV = "boot"