netfilter: Kconfig: use 'default y' instead of 'm' for bool config option

This option, NF_CONNTRACK_SECMARK, is a bool, so it can never be 'm'.

Fixes: 33b8e776 ("[NETFILTER]: Add CONFIG_NETFILTER_ADVANCED option")
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/netfilter/Kconfig

@@ -109,7 +109,7 @@ config NF_CONNTRACK_MARK
 config NF_CONNTRACK_SECMARK
 	bool  'Connection tracking security mark support'
 	depends on NETWORK_SECMARK
-	default m if NETFILTER_ADVANCED=n
+	default y if NETFILTER_ADVANCED=n
 	help
 	  This option enables security markings to be applied to
 	  connections.  Typically they are copied to connections from