panfrost: Use macro for panfrost_get_default_swizzle

Eventually this function should go away, but for now let's clean up a
bit.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Suggested-by: Icecream95 <ixn@disroot.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7352>
1 file changed