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>
24 jobs for !258 with stencil-resolves in 127 minutes and 24 seconds (queued for 4 minutes and 16 seconds)
detached
Status Job ID Name Coverage
  Build+Test
passed #126788
build:make-gallium-drivers-other

00:08:49

passed #126787
build:make-gallium-drivers-radeonsi

00:05:23

passed #126786
build:make-gallium-drivers-swr

00:09:31

passed #126789
build:make-gallium-st-clover-llvm-39

00:05:35

passed #126790
build:make-gallium-st-clover-llvm-4

00:05:32

passed #126791
build:make-gallium-st-clover-llvm-5

00:05:38

passed #126792
build:make-gallium-st-clover-llvm-6

00:05:34

passed #126793
build:make-gallium-st-clover-llvm-7

00:05:48

passed #126794
build:make-gallium-st-other

00:06:40

passed #126785
build:make-loader-classic-dri

00:08:13

passed #126784
build:make-vulkan

00:05:42

passed #126780
build:meson-gallium-clover-llvm5

00:03:07

passed #126781
build:meson-gallium-clover-llvm6

00:03:27

passed #126782
build:meson-gallium-clover-llvm7

00:02:22

passed #126779
build:meson-gallium-drivers-other

00:03:43

passed #126778
build:meson-gallium-radeonsi

00:02:24

passed #126783
build:meson-gallium-st-other

00:04:16

passed #126777
build:meson-gallium-swr

00:09:19

passed #126776
build:meson-glvnd

00:01:51

passed #126775
build:meson-loader-classic-dri

00:04:54

passed #126774
build:meson-vulkan

00:02:43

passed #126796
build:scons-llvm

00:04:46

passed #126795
build:scons-nollvm

00:05:05

passed #126797
build:scons-swr

00:06:49