[IPV4]: Don't select XFRM for ip_gre

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig
index ecea2bc..c7f1f92 100644
--- a/net/ipv4/Kconfig
+++ b/net/ipv4/Kconfig
@@ -252,7 +252,6 @@
 
 config NET_IPGRE
 	tristate "IP: GRE tunnels over IP"
-	select XFRM
 	help
 	  Tunneling means encapsulating data of one protocol type within
 	  another protocol and sending it over a channel that understands the