radeonsi/vcn: Fix chroma pitch for JPEG decode

This used to work fine with linear only, but now we need to use the
actual chroma surface pitch. For JPEG this value is in bytes.
Also swap 64KB_R_X addr mode with 256KB_S_X.

Reviewed-by: Ruijing Dong <ruijing.dong@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33598>
1 file changed