MAINTAINERS: Add miscdevice.h to file list for char/misc drivers.

Signed-off-by: NRobert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

MAINTAINERS

@@ -2193,6 +2193,7 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git
 S:	Supported
 F:	drivers/char/*
 F:	drivers/misc/*
+F:	include/linux/miscdevice.h
 
 CHECKPATCH
 M:	Andy Whitcroft <apw@canonical.com>