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anv: Fix limits when VK_EXT_descriptor_indexing is used

Caio Oliveira requested to merge cmarcelo/mesa:r/fix-descriptor-indexing-limits into master

Update various limits in VkPhysicalDeviceDescriptorIndexingPropertiesEXT that were previously zero to their values from VkPhysicalDeviceLimits. When using VK_EXT_descriptor_indexing, the former limits will apply to all the descriptor layout sets -- not only those using the new feature bits.

For the reference, VK_EXT_descriptor_indexing says

"There are new descriptor set layout and descriptor pool creation
flags that are required to opt in to the update-after-bind
functionality, and there are separate maxPerStage* and
maxDescriptorSet* limits that apply to these descriptor set
layouts which may be much higher than the pre-existing limits. The
old limits only count descriptors in non-updateAfterBind
descriptor set layouts, and the new limits count descriptors in
all descriptor set layouts in the pipeline layout."

Fixes: 6e230d76 "anv: Implement VK_EXT_descriptor_indexing"

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