MAINTAINERS: update i915 and xe entries for include/drm/intel

With all the Intel specific drm files under include/drm/intel, update
the i915, xe, and the shared display entries. Do not discriminate based
on file name pattern, just add the entire directory for all three
entries.

Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Oded Gabbay <ogabbay@kernel.org>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Tvrtko Ursulin <tursulin@ursulin.net>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/e0fdf28307bb3e457d8c67966c09c44cf7ff5783.1717075103.git.jani.nikula@intel.com

MAINTAINERS

@@ -10841,6 +10841,7 @@ S:	Supported
 F:	drivers/gpu/drm/i915/display/
 F:	drivers/gpu/drm/xe/display/
 F:	drivers/gpu/drm/xe/compat-i915-headers
+F:	include/drm/intel/
 
 INTEL DRM I915 DRIVER (Meteor Lake, DG2 and older excluding Poulsbo, Moorestown and derivative)
 M:	Jani Nikula <jani.nikula@linux.intel.com>
@@ -10858,7 +10859,7 @@ F:	Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
 F:	Documentation/gpu/i915.rst
 F:	drivers/gpu/drm/ci/xfails/i915*
 F:	drivers/gpu/drm/i915/
-F:	include/drm/i915*
+F:	include/drm/intel/
 F:	include/uapi/drm/i915_drm.h
 
 INTEL DRM XE DRIVER (Lunar Lake and newer)
@@ -10875,7 +10876,7 @@ T:	git https://gitlab.freedesktop.org/drm/xe/kernel.git
 F:	Documentation/ABI/testing/sysfs-driver-intel-xe-hwmon
 F:	Documentation/gpu/xe/
 F:	drivers/gpu/drm/xe/
-F:	include/drm/xe*
+F:	include/drm/intel/
 F:	include/uapi/drm/xe_drm.h
 
 INTEL ETHERNET DRIVERS