freedreno/a6xx: Change a618 tile_align_h back to 32

freedreno/a6xx: Change a618 tile_align_h back to 32

Commit 60bc7c0e221 ("freedreno: Specify GMEM tile alignment per GPU")
changed the tile_align_h from 32 to 16 (which _should_ be the correct
value).  But this is causing failure in android 9 skqp dstreadshuffle.
(But not, seemingly, with the android 11 version of skia+skqp, which
picks the same tile size.  So this is likely papering something over.)

For now, to unblock things, revert back to the previous tile_align_h.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22683>