MAINTAINERS: add mmap trace events to MEMORY MAPPING

MEMORY MAPPING does not list the mmap.h trace point file, but does list
the mmap.c file.  Couple the trace points with the users and authors of
the trace points for notifications of updates.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Liam R. Howlett <[email protected]>
Acked-by: SeongJae Park <[email protected]>
Acked-by: Steven Rostedt (Google) <[email protected]>
Acked-by: Vlastimil Babka <[email protected]>
Cc: Lorenzo Stoakes <[email protected]>
Cc: Jann Horn <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: howlett

MAINTAINERS

@@ -15562,6 +15562,7 @@ L:	[email protected]
 S:	Maintained
 W:	http://www.linux-mm.org
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
+F:	include/trace/events/mmap.h
 F:	mm/mlock.c
 F:	mm/mmap.c
 F:	mm/mprotect.c