mainboard/google/ocelot: Configure middle logo vertical alignment

This commit overrides the `logo_valignment` setting in the
`common_soc_config` for the Ocelot board variant, similar to
https://review.coreboot.org/c/coreboot/+/87453.

The vertical alignment for the firmware splash screen logo is now set to
`FW_SPLASH_VALIGNMENT_MIDDLE`, which places the top edge of the logo at
the vertical midpoint of the screen.

Change-Id: I29f08d31d325304f7532ed37f9cf3d5ef0bb88ff
Signed-off-by: Avi Uday <aviuday@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/87754
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Pranava Y N <pranavayn@google.com>

src/mainboard/google/ocelot/variants/ocelot/overridetree.cb

@@ -115,6 +115,7 @@ chip soc/intel/pantherlake
 	#| I2C5              | Touchpad                  |
 	#+-------------------+---------------------------+
 	register "common_soc_config" = "{
+		.logo_valignment = FW_SPLASH_VALIGNMENT_MIDDLE,
 		.chipset_lockdown = CHIPSET_LOCKDOWN_COREBOOT,
 		.i2c[1] = {
 			.speed = I2C_SPEED_FAST,