iris: Flag fewer dirty bits in BLORP

v2: 1) Skip flagging IRIS_DIRTY_DEPTH_BUFFER if
       BLORP_BATCH_NO_EMIT_DEPTH_STENCIL is set (Kenneth Graunke)
    2) Add missing flags (Kenneth Graunke)

Signed-off-by: Sagar Ghuge <sagar.ghuge@intel.com>
25 jobs for !288 with blorp in 26 minutes and 41 seconds (queued for 3 seconds)
latest detached
Status Job ID Name Coverage
  Containers Build
passed #151847
containers:ubuntu

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  Build+Test
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build:make-gallium-drivers-other

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build:make-gallium-drivers-radeonsi

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build:make-gallium-drivers-swr

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build:make-gallium-st-clover-llvm-39

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build:make-gallium-st-clover-llvm-4

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build:make-gallium-st-clover-llvm-5

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build:make-gallium-st-clover-llvm-6

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build:make-gallium-st-clover-llvm-7

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build:make-gallium-st-other

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build:make-loader-classic-dri

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build:make-vulkan

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build:meson-gallium-clover-llvm5

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build:meson-gallium-clover-llvm6

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build:meson-gallium-clover-llvm7

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build:meson-gallium-drivers-other

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build:meson-gallium-radeonsi

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build:meson-gallium-st-other

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build:meson-gallium-swr

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build:meson-glvnd

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build:meson-loader-classic-dri

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build:meson-vulkan

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build:scons-llvm

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build:scons-nollvm

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build:scons-swr

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