freedreno/a6xx: Set up multisample sysmem MRTs correctly

We had an extra factor of num_samples in the stride.

Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Kristian H. Kristensen <hoegsberg@google.com>
Tested-by: Marge Bot <mesa/mesa!2848>
Part-of: <mesa/mesa!2848>
41 jobs for !2848 with blitter-love in 12 minutes and 54 seconds (queued for 7 seconds)
detached
Status Job ID Name Coverage
  Container
passed arm_build #1204071
aarch64

00:00:27

passed arm_test #1204072
aarch64

00:00:18

passed lava_arm64 #1204067

00:00:37

passed lava_armhf #1204066

00:00:39

passed x86_build #1204068

00:00:45

passed x86_build_old #1204070

00:00:38

passed x86_test-gl #1204069

00:00:39

 
  Build
passed lava-build:arm64 #1204074

00:03:19

passed lava-build:armhf #1204073

00:04:29

passed meson-arm64 #1204078
aarch64

00:02:58

passed meson-armhf #1204077
aarch64

00:02:15

passed meson-clang #1204079

00:05:50

passed meson-clover #1204082

00:05:12

passed meson-clover-old-llvm #1204083

00:05:58

passed meson-i386 #1204085

00:03:03

passed meson-main #1204076

00:06:29

passed meson-mingw32-x86_64 #1204086

00:05:09

passed meson-testing #1204075

00:02:04

passed meson-vulkan #1204084

00:07:41

passed scons #1204087

00:10:30

passed scons-old-llvm #1204088

00:07:09

passed scons-swr #1204080

00:04:19

passed scons-win64 #1204081

00:05:13

 
  Test
passed arm64_a306_gles2 #1204106
db410c

00:08:08

passed arm64_a630_gles2 #1204103
mesa-cheza

00:01:34

passed arm64_a630_gles3 #1204105
mesa-cheza

00:06:04

passed arm64_a630_gles31 #1204104
mesa-cheza

00:04:03

passed panfrost-t720-test:arm64 #1204089
lava-sun50i-h6-pine-h64

00:08:53

passed panfrost-t760-test:armhf #1204090
lava-rk3288-veyron-jaq

00:05:24

passed panfrost-t860-test:arm64 #1204091
lava-rk3399-gru-kevin

00:06:50

passed piglit-glslparser #1204093

00:04:22

passed piglit-quick_gl #1204092

00:09:47

passed piglit-quick_shader #1204094

00:05:45

passed test-llvmpipe-gles2 #1204095

00:04:06

passed test-softpipe-gles2 #1204096

00:01:58

passed test-softpipe-gles31 1/4 #1204099

00:02:59

passed test-softpipe-gles3 1/2 #1204097

00:05:04

passed test-softpipe-gles31 2/4 #1204100

00:02:45

passed test-softpipe-gles31 3/4 #1204101

00:05:11

passed test-softpipe-gles31 4/4 #1204102

00:03:18

passed test-softpipe-gles3 2/2 #1204098

00:05:21