mb/google/marasov: Skip MBP HOB creation to save boot time

This change skips the MBP HOB creation since coreboot doesn't
use it and also helps to reduce the boot time by ~10msec.

Boot time data:
Before:
*  955:returning from FspSiliconInit    897,278 (33,603)
After:
* 955:returning from FspSiliconInit     864,543 (21,273)

Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: Ia97cca560869fcfd55e65c2e1719cceec6f3ab7c
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71873
Reviewed-by: Sridhar Siricilla <sridhar.siricilla@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/brya/variants/marasov/overridetree.cb

@@ -66,6 +66,8 @@ chip soc/intel/alderlake
 	}"
 	register "sagv" = "SaGv_Enabled"
 
+	register "skip_mbp_hob" = "1"
+
 	register "ext_fivr_settings" = "{
 		.configure_ext_fivr = 1,
 		.v1p05_enable_bitmap = FIVR_ENABLE_ALL_SX,