drm/xe/pciids: separate ARL and MTL PCI IDs

Avoid including PCI IDs for one platform to the PCI IDs of another. It's
more clear to deal with them completely separately at the PCI ID macro
level.

Reviewed-by: Shekhar Chauhan <shekhar.chauhan@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/a30cb0da7694a8eccceba66d676ac59aa0e96176.1725443121.git.jani.nikula@intel.com