dm: update maintainers

Add Mike Snitzer as an additional device-mapper maintainer.
Recognise uapi dm-*.h include files as device-mapper files.
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Cc: Yann Droneaud <ydroneaud@opteya.com>
Cc: Mike Snitzer <snitzer@redhat.com>

MAINTAINERS

@@ -2527,6 +2527,7 @@ S:	Maintained
 
 DEVICE-MAPPER  (LVM)
 M:	Alasdair Kergon <agk@redhat.com>
+M:	Mike Snitzer <snitzer@redhat.com>
 M:	dm-devel@redhat.com
 L:	dm-devel@redhat.com
 W:	http://sources.redhat.com/dm
@@ -2538,6 +2539,7 @@ F:	drivers/md/dm*
 F:	drivers/md/persistent-data/
 F:	include/linux/device-mapper.h
 F:	include/linux/dm-*.h
+F:	include/uapi/linux/dm-*.h
 
 DIOLAN U2C-12 I2C DRIVER
 M:	Guenter Roeck <linux@roeck-us.net>