RDMA: Update exported headers list

Various RDMA headers are intended to be exported to userspace, so add
them to the headers-y list.  Add a (strictly speaking, superfluous)
include of <linux/types.h> to avoid a headers_check warning.

Signed-off-by: Roland Dreier <roland@purestorage.com>
diff --git a/include/rdma/Kbuild b/include/rdma/Kbuild
index e7c0432..ea56f76 100644
--- a/include/rdma/Kbuild
+++ b/include/rdma/Kbuild
@@ -1 +1,6 @@
+header-y += ib_user_cm.h
 header-y += ib_user_mad.h
+header-y += ib_user_sa.h
+header-y += ib_user_verbs.h
+header-y += rdma_netlink.h
+header-y += rdma_user_cm.h
diff --git a/include/rdma/ib_user_cm.h b/include/rdma/ib_user_cm.h
index bd3d380..f79014a 100644
--- a/include/rdma/ib_user_cm.h
+++ b/include/rdma/ib_user_cm.h
@@ -34,6 +34,7 @@
 #ifndef IB_USER_CM_H
 #define IB_USER_CM_H
 
+#include <linux/types.h>
 #include <rdma/ib_user_sa.h>
 
 #define IB_USER_CM_ABI_VERSION 5