intel/isl: add storage image support for B8G8R8A8

This allows B8G8R8A8 to be used as a swapchain format.

Signed-off-by: Simon Ser <contact@emersion.fr>
33 jobs for !10426 with anv-bgra-storage in 14 seconds (queued for 2 seconds)
latest detached
Status Job ID Name Coverage
  Sanity
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sanity

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  Container
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aarch64 manual
arm_build
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windows shell 1809 mesa manual
windows_build_vs2019
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manual
x86_build-base
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manual
x86_test-base
 
  Container 2
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android_build
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i386_build
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kernel+rootfs_amd64
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aarch64
kernel+rootfs_arm64
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aarch64
kernel+rootfs_armhf
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ppc64el_build
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s390x_build
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x86_build
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x86_test-gl
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x86_test-vk
 
  Meson X86 64
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meson-clang
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meson-clover
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meson-clover-testing
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meson-gallium
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meson-release
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meson-testing
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meson-testing-asan
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meson-vulkan
 
  Build Misc
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arm_test
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meson-android
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aarch64
meson-arm64
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aarch64
meson-arm64-asan
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aarch64
meson-arm64-build-test
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aarch64
meson-armhf
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meson-i386
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meson-mingw32-x86_64
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meson-ppc64el
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kvm
meson-s390x