drm/i915/mtl: Add OA support by enabling 32 bit OAG formats for MTL

Without an entry in oa_init_supported_formats, OA will not be functional
in MTL. Enable OA support by enabling 32 bit OAG formats for MTL.

Mesa MR: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20228

Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221212220902.1819159-5-umesh.nerlige.ramappa@intel.com