build 'IPsec BEET mode' as a module on storm

SVN-Revision: 12680

target/linux/storm/config-default

@@ -138,7 +138,7 @@ CONFIG_HW_RANDOM=y
 # CONFIG_INET_ESP is not set
 # CONFIG_INET_IPCOMP is not set
 # CONFIG_INET_TUNNEL is not set
-CONFIG_INET_XFRM_MODE_BEET=y
+CONFIG_INET_XFRM_MODE_BEET=m
 # CONFIG_INET_XFRM_MODE_TRANSPORT is not set
 # CONFIG_INET_XFRM_MODE_TUNNEL is not set
 # CONFIG_INET_XFRM_TUNNEL is not set