radv: Restrict YUVY formats to 1 layer.

Fixes: 8bb3cec7 "radv: Expose VK_EXT_ycbcr_image_arrays."
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
14 jobs for !758 with ycbcr-array-gfx9-hang-fix in 8 minutes and 57 seconds (queued for 1 second)
detached
Status Name Job ID Coverage
  Containers Build
passed debian #274626

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  Build+Test
passed meson-clang #274628

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passed meson-gallium-clover-llvm #274634

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passed meson-gallium-clover-llvm39 #274635

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passed meson-gallium-drivers-other #274633

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passed meson-gallium-radeonsi #274632

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passed meson-gallium-st-other #274636

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passed meson-gallium-swr #274627

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passed meson-glvnd #274631

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passed meson-loader-classic-dri #274630

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passed meson-vulkan #274629

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passed scons-llvm #274638

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passed scons-nollvm #274637

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passed scons-swr #274639

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