radeonsi: don't do PFP_SYNC_ME before CP DMA and compute blits

It's not needed before them, and we already set it after them.

Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23687>
2 files changed