pan/midgard: Handle 64-bit address in mir_mask_of_read_components

This is a bit of a hack, but it'll hold us over until we have 64-bit
support wired through.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
13 jobs for !1651 with opencl-r in 8 minutes and 53 seconds (queued for 6 seconds)
detached
Status Name Job ID Coverage
  Containers Build
passed debian #498749

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  Build+Test
passed meson-arm64 #498758

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passed meson-armhf #498757

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passed meson-i386 #498759

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passed meson-swr-glvnd #498750

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passed meson-vulkan #498756

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passed scons-llvm #498761

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passed scons-nollvm #498760

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passed scons-swr #498752

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passed scons-win64 #498753

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