dsa: Need to select PHYLIB.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/dsa/Kconfig b/net/dsa/Kconfig
index 3f2fd39..cdce4c6 100644
--- a/net/dsa/Kconfig
+++ b/net/dsa/Kconfig
@@ -2,6 +2,7 @@
 	bool "Distributed Switch Architecture support"
 	default n
 	depends on EXPERIMENTAL
+	select PHYLIB
 	---help---
 	  This allows you to use hardware switch chips that use
 	  the Distributed Switch Architecture.