anv: enable VK_EXT_shader_viewport_index_layer

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

src/intel/vulkan/anv_extensions.py

@@ -111,6 +111,7 @@ EXTENSIONS = [
     Extension('VK_EXT_external_memory_dma_buf',           1, True),
     Extension('VK_EXT_global_priority',                   1,
               'device->has_context_priority'),
+    Extension('VK_EXT_shader_viewport_index_layer',       1, True),
 ]
 
 class VkVersion:

src/intel/vulkan/anv_pipeline.c

@@ -144,6 +144,7 @@ anv_shader_compile_to_nir(struct anv_pipeline *pipeline,
          .multiview = true,
          .variable_pointers = true,
          .storage_16bit = device->instance->physicalDevice.info.gen >= 8,
+         .shader_viewport_index_layer = true,
          .subgroup_arithmetic = true,
          .subgroup_basic = true,
          .subgroup_ballot = true,