soc/intel/alderlake: Disable Internal Gfx based on SOC_INTEL_DISABLE_IGD
Make IGD disable when mainboard user selects SOC_INTEL_DISABLE_IGD.
TEST=Able to get depthcharge pre-OS splash screen with AMD Radeon RX
5700 PCI-E DGPU when mainboard user selects SOC_INTEL_DISABLE_IGD.
Change-Id: Ibbe9c8c4d77018de83815d7d203284b1fbc0da58
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49291
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>