freedreno/a6xx: Support MSAA resolve blits on blitter
This gets stencil and depth resolves working properly.
Fixes:
dEQP-GLES3.functional.fbo.msaa.2_samples.depth32f_stencil8
dEQP-GLES3.functional.fbo.msaa.2_samples.depth24_stencil8
dEQP-GLES3.functional.fbo.msaa.4_samples.depth32f_stencil8
dEQP-GLES3.functional.fbo.msaa.4_samples.depth24_stencil8
dEQP-GLES3.functional.fbo.invalidate.whole.unbind_blit_msaa_color
dEQP-GLES3.functional.fbo.invalidate.sub.unbind_blit_msaa_color
Signed-off-by: Kristian H. Kristensen <hoegsberg@chromium.org>