MAINTAINERS: Add some more headers to the IDE section

The folder include/hw/ide/ belongs to the IDE section.
Signed-off-by: NThomas Huth <thuth@redhat.com>
Reviewed-by: NJohn Snow <jsnow@redhat.com>
Message-id: 1474646996-30421-1-git-send-email-thuth@redhat.com
Signed-off-by: NJohn Snow <jsnow@redhat.com>

MAINTAINERS

@@ -772,6 +772,7 @@ M: John Snow <jsnow@redhat.com>
 L: qemu-block@nongnu.org
 S: Supported
 F: include/hw/ide.h
+F: include/hw/ide/
 F: hw/ide/
 F: hw/block/block.c
 F: hw/block/cdrom.c