Enable the VK_KHR_shader_untyped_pointers extension and the
shaderUntypedPointers feature for Valhall and newer (v9+).
Bifrost (v6/v7) has issues with 8-bit vector loads through untyped
pointers combined with 16-bit storage, so restrict the extension
to architectures where it's fully functional.
Signed-off-by: Christian Gmeiner <cgmeiner@igalia.com>
Reviewed-by: Lars-Ivar Hesselberg Simonsen <lars-ivar.simonsen@arm.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/40457>