MAINTAINERS: add UBIFS section

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

MAINTAINERS

@@ -2307,6 +2307,16 @@ L:	linux-mtd@lists.infradead.org
 W:	http://www.linux-mtd.infradead.org/doc/jffs2.html
 S:	Maintained
 
+UBI FILE SYSTEM (UBIFS)
+P:	Artem Bityutskiy
+M:	dedekind@infradead.org
+P:	Adrian Hunter
+M:	ext-adrian.hunter@nokia.com
+L:	linux-mtd@lists.infradead.org
+T:	git git://git.infradead.org/~dedekind/ubifs-2.6.git
+W:	http://www.linux-mtd.infradead.org/doc/ubifs.html
+S:	Maintained
+
 JFS FILESYSTEM
 P:	Dave Kleikamp
 M:	shaggy@austin.ibm.com