unifdef-y and header-y has same semantic. So there is no need to have both.
Drop the unifdef-y variant and sort all lines again
Signed-off-by: Sam Ravnborg
header-y += ip6_tables.h header-y += ip6t_HL.h header-y += ip6t_LOG.h header-y += ip6t_REJECT.h header-y += ip6t_ah.h header-y += ip6t_frag.h header-y += ip6t_hl.h header-y += ip6t_ipv6header.h header-y += ip6t_mh.h header-y += ip6t_opts.h header-y += ip6t_rt.h