ipv6: Move ipv6 twsk accessors outside of CONFIG_IPV6 ifdefs.
ipv6: Move ipv6 twsk accessors outside of CONFIG_IPV6 ifdefs.

Fixes build when ipv6 is disabled.

Reported-by: Fengguang Wu <f25caf39e3e90f2a28a0f6211af92081109b663e@linux.intel.com>
Signed-off-by: David S. Miller <fe08d3c717adf2ae63592e4c9aec6e3e404d8e3e@davemloft.net>

TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs