MAINTAINERS: add entry for freezer

Now that people are using freezer for non-suspend/hibernation stuff, it
should have separate maintainers entry so that it is easier to find.

Signed-off-by: Pavel Machek <pavel@suse.cz>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS

@@ -1821,6 +1821,14 @@ M:	hch@infradead.org
 W:	ftp://ftp.openlinux.org/pub/people/hch/vxfs
 S:	Maintained
 
+FREEZER
+P:	Pavel Machek
+M:	pavel@suse.cz
+P:	Rafael J. Wysocki
+M:	rjw@sisk.pl
+L:	linux-pm@lists.linux-foundation.org
+S:	Supported
+
 FTRACE
 P:	Steven Rostedt
 M:	rostedt@goodmis.org