ipvlan: Fix dependency issue

kbuild-build-bot reported that if NETFILTER is not selected, the
build fails pointing to netfilter symbols.

Fixes: 4fbae7d83c98 ("ipvlan: Introduce l3s mode")

Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 8768a62..95c32f2 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -149,6 +149,7 @@
     tristate "IP-VLAN support"
     depends on INET
     depends on IPV6
+    depends on NETFILTER
     depends on NET_L3_MASTER_DEV
     ---help---
       This allows one to create virtual devices off of a main interface