Make !NETFILTER_ADVANCED enable IP6_NF_MATCH_IPV6HEADER

We want IPV6HEADER matching for the non-advanced default netfilter
configuration, since it's part of the standard netfilter setup of at
least some distributions (eg Fedora).

Otherwise NETFILTER_ADVANCED loses much of its point, since even
non-advanced users would have to enable all the advanced options just to
get a working IPv6 netfilter setup.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

net/ipv6/netfilter/Kconfig

@@ -99,7 +99,7 @@ config IP6_NF_MATCH_HL
 config IP6_NF_MATCH_IPV6HEADER
 	tristate '"ipv6header" IPv6 Extension Headers Match'
 	depends on IP6_NF_IPTABLES
-	depends on NETFILTER_ADVANCED
+	default m if NETFILTER_ADVANCED=n
 	help
 	  This module allows one to match packets based upon
 	  the ipv6 extension headers.