anv: Fix subgroupSupportedStages physical property
Use the proper Vulkan values that can be combined into a bitmask.
Fixes: f40a08d2 ("anv: Don't advertise unsupported shader stages")
Use the proper Vulkan values that can be combined into a bitmask.
Fixes: f40a08d2 ("anv: Don't advertise unsupported shader stages")