mb/google/fatcat: Set logo vertical alignment to middle for variants

This commit configures the firmware splash logo's vertical alignment to
be centered (middle) for the Fatcat variants: Felino, Francka, and
Kinmen.

This is achieved by setting the 'logo_valignment' field to
'FW_SPLASH_VALIGNMENT_MIDDLE' within the 'common_soc_config' register.

BUG=b:409718202
TEST=Able to see FW splash screen at the middle of the screen while
booting google/fatcat.

Change-Id: Idf7f06cac89c14f58e5a3bcab5fe61d72171352b
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/87617
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jayvik Desai <jayvik@google.com>

src/mainboard/google/fatcat/variants/felino/overridetree.cb

@@ -102,6 +102,7 @@ chip soc/intel/pantherlake
 	#| I2C4              | CLICK PAD                 |
 	#+-------------------+---------------------------+
 	register "common_soc_config" = "{
+		.logo_valignment = FW_SPLASH_VALIGNMENT_MIDDLE,
 		.i2c[1] = {
 			.early_init=1,
 			.speed = I2C_SPEED_FAST,

src/mainboard/google/fatcat/variants/francka/overridetree.cb

@@ -78,6 +78,7 @@ chip soc/intel/pantherlake
 	#| I2C4              | Touchscreen, Touchpad     |
 	#+-------------------+---------------------------+
 	register "common_soc_config" = "{
+		.logo_valignment = FW_SPLASH_VALIGNMENT_MIDDLE,
 		.chipset_lockdown = CHIPSET_LOCKDOWN_COREBOOT,
 		.i2c[1] = {
 			.early_init = 1,

src/mainboard/google/fatcat/variants/kinmen/overridetree.cb

@@ -1,4 +1,7 @@
 chip soc/intel/pantherlake
+	register "common_soc_config" = "{
+		.logo_valignment = FW_SPLASH_VALIGNMENT_MIDDLE,
+	}"
 
 	device domain 0 on
 	end