[TCP]: TCP_CONG_YEAH requires TCP_CONG_VEGAS

These two congestion control modules share code.
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/Kconfig

@@ -577,6 +577,7 @@ config TCP_CONG_VENO
 config TCP_CONG_YEAH
 	tristate "YeAH TCP"
 	depends on EXPERIMENTAL
+	select TCP_CONG_VEGAS
 	default n
 	---help---
 	YeAH-TCP is a sender-side high-speed enabled TCP congestion control