mb/google/brya/var/nivviks: Initialise overridetree
Add an initial overridetree for nivviks based on the pre-proto schematic
and build matrix.
BUG=b:
197479026
TEST=abuild -a -x -c max -p none -t google/brya -b nivviks
Signed-off-by: Reka Norman <rekanorman@google.com>
Change-Id: Id3ecd184415a20a3a52da8bb5e60fe2ce0495b44
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61605
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kangheui Won <khwon@chromium.org>
Reviewed-by: Rizwan Qureshi <rizwan.qureshi@intel.com>