firewire: Install firewire-constants.h and firewire-cdev.h for userspace.

This just adds them to include/linux/Kbuild using header-y.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

include/linux/Kbuild

@@ -62,6 +62,8 @@ header-y += fadvise.h
 header-y += fd.h
 header-y += fdreg.h
 header-y += fib_rules.h
+header-y += firewire-cdev.h
+header-y += firewire-constants.h
 header-y += fuse.h
 header-y += genetlink.h
 header-y += gen_stats.h