radeon/jpeg: fix the jpeg dt_pitch with YUYV format

radeon/jpeg: fix the jpeg dt_pitch with YUYV format

The dt_pitch should be same as NV12 format from decoder views,
and it finally got corrected with gfx9 surface's fixes from MR
https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3738

Signed-off-by: Leo Liu <leo.liu@amd.com>
Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3738>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3738>