MAINTAINERS: add git url entry for UIO

Added git url for UIO section.
Signed-off-by: Mandeep Sandhu <mandeep.sandhu@cyaninc.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

MAINTAINERS

@@ -10156,6 +10156,7 @@ USERSPACE I/O (UIO)
 M:	"Hans J. Koch" <hjk@hansjkoch.de>
 M:	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 S:	Maintained
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git
 F:	Documentation/DocBook/uio-howto.tmpl
 F:	drivers/uio/
 F:	include/linux/uio*.h