drm/xe/gsc: add gsc device support

Create mei-gscfi auxiliary device and configure interrupts
to be consumed by mei-gsc device driver.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Vitaly Lubart <vitaly.lubart@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>