purism/librem13v2: Add microcode values in Kconfig

The FSP Temp RAM init will fail if the mircocode values are set
to 0. A valid microcode update needs to be included and its size
and offset need to be set in the config.

Change-Id: I26d05bd7b37c8d91bf34f399c7c4189f9d3dd34a
Signed-off-by: Youness Alaoui <youness.alaoui@puri.sm>
Reviewed-on: https://review.coreboot.org/19936
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

src/mainboard/purism/librem13v2/Kconfig

@@ -54,5 +54,12 @@ config DIMM_SPD_SIZE
 	int
 	default 512
 
+config CPU_MICROCODE_CBFS_LEN
+	hex
+	default 0x17800
+
+config CPU_MICROCODE_CBFS_LOC
+	hex
+	default 0xFFE115A0
 
 endif