anv: limit URB reconfigurations when using blorp

If the last graphics pipeline bound to the command buffer has enough
space in its VS URB entries for Blorp then avoid reconfiguring the URB
partitions.

v2: s/0/MESA_SHADER_VERTEX/ (Caio)

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
14 jobs for !396 with wip/djdeath/anv-blorp-urb-reconfig in 10 minutes and 51 seconds (queued for 5 seconds)
detached
Status Name Job ID Coverage
  Containers Build
passed debian #250184

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  Build+Test
passed meson-clang #250186

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canceled meson-gallium-clover-llvm #250192

canceled meson-gallium-clover-llvm39 #250193

canceled meson-gallium-drivers-other #250191

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canceled meson-gallium-radeonsi #250190

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canceled meson-gallium-st-other #250194

canceled meson-gallium-swr #250185

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passed meson-glvnd #250189

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passed meson-loader-classic-dri #250188

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passed meson-vulkan #250187

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canceled scons-llvm #250196

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canceled scons-nollvm #250195

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canceled scons-swr #250197

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