nv50/ir: Add fallthrough statement.

Fix defect reported by Coverity Scan.

Missing break in switch (MISSING_BREAK) unterminated_case: The case for value nir_intrinsic_bindless_image_samples is not terminated by a 'break' statement.

Suggested-by: Karol Herbst kherbst@redhat.com Signed-off-by: Vinson Lee vlee@freedesktop.org

cc: @karolherbst