r300g: restore performance after RADEON_FLAG_NO_INTERPROCESS_SHARING was added

v1: Fix skipped slab allocators and the buffer cache.

v2: Use only 1 domain for texture allocation

v3: Added flag for the create_fence call too

Based on Marek v1 and v2 proposed fixes.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=1107812.patch



Cc: 19.1 <mesa-stable@lists.freedesktop.org>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>
(cherry picked from commit ffd2f948)