update_gpu_drivers: Add valhall support

BUG=b:160108252
TEST=../platform/dev/contrib/update_gpu_drivers.sh \
          --package mali-drivers-valhall

Change-Id: I79ff4b4e8dd2dee1228505957b939e898b0b0791
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2272240
Reviewed-by: Fei Shao <fshao@chromium.org>
Reviewed-by: Ilja H. Friedel <ihf@chromium.org>
Tested-by: Ilja H. Friedel <ihf@chromium.org>
Commit-Queue: Nicolas Boichat <drinkcat@chromium.org>
1 file changed