nfs-kerne-server: fix host/build

Signed-off-by: Nicolas Thill <nico@openwrt.org>

net/nfs-kernel-server/Makefile

@@ -101,6 +101,8 @@ HOST_CONFIGURE_ARGS += \
 	--disable-gss \
 	--disable-nfsv4 \
 	--disable-nfsv41 \
+	--disable-ipv6 \
+	--disable-tirpc \
 	--without-tcp-wrappers
 
 HOST_CONFIGURE_VARS += \