[CIFS] Reserve upcall IDX value for CIFS with connector header and add
Kconfig option for CIFS upcall.

Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/include/linux/connector.h b/include/linux/connector.h
index c5769c65..ad1a22c 100644
--- a/include/linux/connector.h
+++ b/include/linux/connector.h
@@ -32,6 +32,8 @@
  */
 #define CN_IDX_PROC			0x1
 #define CN_VAL_PROC			0x1
+#define CN_IDX_CIFS			0x2
+#define CN_VAL_CIFS                     0x1
 
 #define CN_NETLINK_USERS		1