firewire vs. ieee1394: clarify MAINTAINERS

Maintainers like to receive less mail, and submitters like to have to Cc
less recipients.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

MAINTAINERS

@@ -1595,7 +1595,7 @@ P:	Alexander Viro
 M:	viro@zeniv.linux.org.uk
 S:	Maintained
 
-FIREWIRE SUBSYSTEM
+FIREWIRE SUBSYSTEM (drivers/firewire, <linux/firewire*.h>)
 P:	Kristian Hoegsberg, Stefan Richter
 M:	krh@redhat.com, stefanr@s5r6.in-berlin.de
 L:	linux1394-devel@lists.sourceforge.net
@@ -1917,7 +1917,7 @@ L:	linux-ide@vger.kernel.org
 L:	linux-scsi@vger.kernel.org
 S:	Orphan
 
-IEEE 1394 SUBSYSTEM
+IEEE 1394 SUBSYSTEM (drivers/ieee1394)
 P:	Ben Collins
 M:	ben.collins@ubuntu.com
 P:	Stefan Richter