radv: Fix DCC image store check

Doesn't seem to be causing any issues right now but could with modifiers potentially.

Matches what is in RadeonSI where the comment is also shamelessly stolen from.

Signed-off-by: Joshua Ashton <joshua@froggi.es>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <!12811>
39 jobs for !12811 with radv-dcc-image-store-fix in 18 minutes and 29 seconds (queued for 16 seconds)
latest detached
Status Name Job ID Coverage
  Sanity
passed sanity #13578301

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  Container
passed debian/android_build #13578311

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passed debian/arm_build #13578317
aarch64

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passed debian/arm_test #13578325

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passed debian/i386_build #13578306

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passed debian/ppc64el_build #13578307

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passed debian/s390x_build #13578309

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passed debian/x86_build #13578304

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passed debian/x86_build-base #13578303

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passed debian/x86_test-base #13578312

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passed debian/x86_test-gl #13578314

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passed debian/x86_test-vk #13578316

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passed fedora/x86_build #13578319

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passed kernel+rootfs_amd64 #13578321

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passed kernel+rootfs_arm64 #13578322
aarch64

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passed kernel+rootfs_armhf #13578324
aarch64

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passed windows_build_vs2019 #13578326
windows shell 1809 mesa

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  Build X86 64
passed debian-clang #13578333

00:09:05

passed debian-clover #13578334

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passed debian-clover-testing #13578329

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passed debian-gallium #13578330

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passed debian-release #13578331

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passed debian-testing #13578327

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passed debian-testing-asan #13578328

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passed debian-vulkan #13578335

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passed fedora-release #13578332

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  Build Misc
passed debian-android #13578336

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passed debian-arm64 #13578338
aarch64

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passed debian-arm64-asan #13578339
aarch64

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passed debian-arm64-build-test #13578340
aarch64

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passed debian-armhf #13578337
aarch64

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passed debian-i386 #13578342

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passed debian-mingw32-x86_64 #13578344

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passed debian-ppc64el #13578343

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passed windows-vs2019 #13578341
windows docker 1809 mesa

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  Amd
passed radv-fossils #13578348

00:05:23

passed radv_stoney_vkcts:amd64 1/3 #13578345
mesa-ci-x86-64-lava-hp-11A-G6-EE-grunt

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passed radv_stoney_vkcts:amd64 2/3 #13578346
mesa-ci-x86-64-lava-hp-11A-G6-EE-grunt

00:14:12

passed radv_stoney_vkcts:amd64 3/3 #13578347
mesa-ci-x86-64-lava-hp-11A-G6-EE-grunt

00:13:28