radeon: Enable GL_EXT_framebuffer_blit
The dd_function_table::BlitFramebuffer is already initialized to
_mesa_meta_BlitFramebuffer, so it should just work.
Tested on a Radeon 7500 (OpenGL renderer string: Mesa DRI R100 (RV200
5157) TCL DRI2). I couldn't do a full piglit run because it would tank
the system with or without this patch. I just ran all the blit tests
(-t blit to piglit-run.py). Only fbo-sys-sub-blit failed. All of the
other tests that weren't skipped (i.e., all the multisample and sRGB
tests skip) passed.
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>