v3dv: Fix assert.
Fix defect reported by Coverity Scan.
Side effect in assertion (ASSERT_SIDE_EFFECT) assignment_where_comparison_intended: Assignment deviceMask = 1U has a side effect. This code will work differently in a non-debug build.
Fixes: 234e1b73 ("v3dv: implement VK_KHR_device_group") Signed-off-by: Vinson Lee vlee@freedesktop.org