radv: allocate descriptor BOs in the 32-bit addr space

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

src/amd/vulkan/radv_descriptor_set.c

@@ -594,7 +594,8 @@ VkResult radv_CreateDescriptorPool(
 		pool->bo = device->ws->buffer_create(device->ws, bo_size, 32,
 						     RADEON_DOMAIN_VRAM,
 						     RADEON_FLAG_NO_INTERPROCESS_SHARING |
-						     RADEON_FLAG_READ_ONLY);
+						     RADEON_FLAG_READ_ONLY |
+						     RADEON_FLAG_32BIT);
 		pool->mapped_ptr = (uint8_t*)device->ws->buffer_map(pool->bo);
 	}
 	pool->size = bo_size;