NFC: Export nfc.h to userland

The netlink commands and attributes, along with the socket structure
definitions need to be exported.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index 3c9b616..f08e3ae 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -271,6 +271,7 @@
 header-y += netfilter_ipv6.h
 header-y += netlink.h
 header-y += netrom.h
+header-y += nfc.h
 header-y += nfs.h
 header-y += nfs2.h
 header-y += nfs3.h