fix nfs-utils for IPv6

FIXME: this is rather a workaround, the package flavour system should
support conditional defaults (or we should select the flavour option
conditionally from the main package symbol?).

package/Config.in

@@ -7,6 +7,9 @@ config ADK_ENABLE_IPV6
 	prompt "enable IPv6 globally"
 	boolean
 	default y
+	# FIXME: selecting stuff here is ugly, better fix package flavours to
+	#        support a symbol-value-based default (i.e., "default y if IPV6")
+	select ADK_PACKAGE_NFS_UTILS_WITH_TIRPC if ADK_PACKAGE_NFS_UTILS != n
 	help
 	  This enables IPv6 support in all related applications. Basically this
 	  just means passing --enable-ipv6 to the configure script, but the