anv: track descriptor set layout flags

To identify push descriptors.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Emma Anholt <emma@anholt.net>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19050>

src/intel/vulkan/anv_private.h

@@ -1708,6 +1708,8 @@ bool anv_descriptor_requires_bindless(const struct anv_physical_device *pdevice,
 struct anv_descriptor_set_layout {
    struct vk_object_base base;
 
+   VkDescriptorSetLayoutCreateFlags flags;
+
    /* Descriptor set layouts can be destroyed at almost any time */
    uint32_t ref_cnt;