minigbm: mediatek: Update restricted flag name

Follow CL:5689125 and rename the flag.

BUG=b:352225473
TEST=emerge-geralt minigbm libdrm

Cq-Depend: chromium:5689125
Change-Id: I271d57e255a79af5b8e93ddb91186107dc8ec529
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/minigbm/+/5690587
Reviewed-by: Chen-Yu Tsai <[email protected]>
Tested-by: Fei Shao <[email protected]>
Commit-Queue: Fei Shao <[email protected]>
1 file changed