media: MAINTAINERS: add maintainers for Intel IPU6 input system driver

Update MAINTAINERS file for Intel IPU6 input system driver.
Signed-off-by: Bingbu Cao <bingbu.cao@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

MAINTAINERS

@@ -11005,6 +11005,16 @@ F:	Documentation/admin-guide/media/ipu3_rcb.svg
 F:	Documentation/userspace-api/media/v4l/metafmt-intel-ipu3.rst
 F:	drivers/staging/media/ipu3/
 
+INTEL IPU6 INPUT SYSTEM DRIVER
+M:	Sakari Ailus <sakari.ailus@linux.intel.com>
+M:	Bingbu Cao <bingbu.cao@intel.com>
+R:	Tianshu Qiu <tian.shu.qiu@intel.com>
+L:	linux-media@vger.kernel.org
+S:	Maintained
+T:	git git://linuxtv.org/media_tree.git
+F:	Documentation/admin-guide/media/ipu6-isys.rst
+F:	drivers/media/pci/intel/ipu6/
+
 INTEL ISHTP ECLITE DRIVER
 M:	Sumesh K Naduvalath <sumesh.k.naduvalath@intel.com>
 L:	platform-driver-x86@vger.kernel.org