drm/xe/compat: remove old pcode compat interface

drm/xe/compat: remove old pcode compat interface

With display code using the struct drm_device based pcode interface, we
can drop the old pcode compat interface.

We can also drop the __compat_uncore_to_tile() helper from
intel_uncore.h compat header.

Turns out a couple of headers depended on the intel_uncore.h include via
intel_pcode.h. Fix them.

Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://lore.kernel.org/r/948016a031dcb2acef0c97071aac09fa49613e07.1750678991.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>