pan/mdg: fix src_type in instructions that need a implicit zero

We were incorrectly assuming uint32 for src_type[1] regardless of
src_type[0].

Signed-off-by: Italo Nicola <italonicola@collabora.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5933>
1 file changed