MAINTAINERS: add an entry for FSNOTIFY infrastructure

There is alreay an entry for all the backends, but those entries do
not cover all the fsnotify files.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>

MAINTAINERS

@@ -5780,6 +5780,14 @@ F:	fs/crypto/
 F:	include/linux/fscrypt*.h
 F:	Documentation/filesystems/fscrypt.rst
 
+FSNOTIFY: FILESYSTEM NOTIFICATION INFRASTRUCTURE
+M:	Jan Kara <jack@suse.cz>
+R:	Amir Goldstein <amir73il@gmail.com>
+L:	linux-fsdevel@vger.kernel.org
+S:	Maintained
+F:	fs/notify/
+F:	include/linux/fsnotify*.h
+
 FUJITSU LAPTOP EXTRAS
 M:	Jonathan Woithe <jwoithe@just42.net>
 L:	platform-driver-x86@vger.kernel.org