mb/google/brya/var/agah: Enable DPTF oem_variables

Support oem_variables and change based on EC notify event.

BUG=b:238921409
TEST=emerge-draco coreboot
1. check ACPI object ODVX has oem_variable[0]=0
Name (ODVX, Package (0x06)
{
   0x00000000,
   0x00000000,
   0x00000000,
   0x00000000,
   0x00000000,
   0x00000000
}
2. check can get EC oem variable change notify in the kernel log

Change-Id: Ibd856563a43d73a3b1be09b3fbebca1b36b5eab1
Signed-off-by: Tony Huang <tony-huang@quanta.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66575
Reviewed-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions