Provide a generic message interface that can be used for both virtual and physical if.

Change-Id: I8f422b40e324db99d77233d2112be70f24da9253
Signed-off-by: Sol Kavy <skavy@codeaurora.org>
diff --git a/Makefile b/Makefile
index 1dc70f4..6d025e1 100755
--- a/Makefile
+++ b/Makefile
@@ -25,6 +25,7 @@
 			nss_init.o \
 			nss_cmn.o \
 			nss_core.o \
+			nss_if.o \
 			nss_ipv4.o \
 			nss_ipv6.o \
 			nss_lag.o \
@@ -51,7 +52,6 @@
 			nss_tx_rx_phys_if.o \
 			nss_tx_rx_virt_if.o
 
-
 obj-m += qca-nss-connmgr-ipv4.o
 obj-m += qca-nss-connmgr-ipv6.o
 obj-m += qca-nss-tunipip6.o