soc/intel/meteorlake: Drop redundant `MCHBAR` programming in romstage

This patch drops redundant MCHBAR programming in romstage as bootblock
already done with MCHBAR setting up.

TEST=Able to boot Google/Rex to ChromeOS and MCHBAR is set to correct
value as per iomap.h

Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: Ic2c05f47ab22dc7fe087782a1ce9b7b692ea157e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67455
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>

src/soc/intel/meteorlake/romstage/systemagent.c

@@ -8,7 +8,6 @@
 void systemagent_early_init(void)
 {
 	static const struct sa_mmio_descriptor soc_fixed_pci_resources[] = {
-		{ MCHBAR, MCH_BASE_ADDRESS, MCH_BASE_SIZE, "MCHBAR" },
 		{ DMIBAR, DMI_BASE_ADDRESS, DMI_BASE_SIZE, "DMIBAR" },
 		{ EPBAR, EP_BASE_ADDRESS, EP_BASE_SIZE, "EPBAR" },
 	};