freedreno: Protect gmem_cache ralloc allocations

Since the ralloc context for cache_key allocation is shared between all
the contexts hanging off a screen, we need to allocate the key under the
screen->lock.

Fixes: 91f9bb99c5e ("freedreno: add gmem state cache")
Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7342>
(cherry picked from commit cb034ae44f4a1f3ed036ba71fc42746efb4cd775)
2 files changed