kms_flip: Change __wait_for_vblank to use helper function.

Change __wait_for_vblank() to use kmstest_get_vbl_flag() helper function.

Signed-off-by: Robert Foss <robert.foss@collabora.com>
Signed-off-by: Marius Vlad <marius.c.vlad@intel.com>
1 file changed