mainboard/intel/glkrvp: Configure Prmrr and Enable SGX

Configure PRMRR to allocate 128MiB for SGX enclave memory and enable SGX
by default for GLKRVP platform.

Supported PRMRR size options:
0x02000000 - 32MiB
0x04000000 - 64MiB
0x08000000 - 128MiB

Change-Id: Ifa39df4a1da84bae49551a9626257bda0729752b
Signed-off-by: Pratik Prajapati <pratikkumar.v.prajapati@intel.com>
Reviewed-on: https://review.coreboot.org/21278
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
1 file changed