i965: Remove break after return

Signed-off-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>

src/mesa/drivers/dri/i965/intel_blit.c

@@ -77,13 +77,10 @@ br13_for_cpp(int cpp)
    switch (cpp) {
    case 4:
       return BR13_8888;
-      break;
    case 2:
       return BR13_565;
-      break;
    case 1:
       return BR13_8;
-      break;
    default:
       unreachable("not reached");
    }