rt2x00: move under ralink vendor directory

Part of reorganising wireless drivers directory and Kconfig.

Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
diff --git a/drivers/net/wireless/Kconfig b/drivers/net/wireless/Kconfig
index 5186084..c58e244 100644
--- a/drivers/net/wireless/Kconfig
+++ b/drivers/net/wireless/Kconfig
@@ -24,6 +24,7 @@
 source "drivers/net/wireless/intel/Kconfig"
 source "drivers/net/wireless/intersil/Kconfig"
 source "drivers/net/wireless/marvell/Kconfig"
+source "drivers/net/wireless/ralink/Kconfig"
 source "drivers/net/wireless/realtek/Kconfig"
 source "drivers/net/wireless/rsi/Kconfig"
 source "drivers/net/wireless/st/Kconfig"
@@ -97,7 +98,6 @@
 	  called mac80211_hwsim.  If unsure, say N.
 
 source "drivers/net/wireless/ath/Kconfig"
-source "drivers/net/wireless/rt2x00/Kconfig"
 source "drivers/net/wireless/mediatek/Kconfig"
 source "drivers/net/wireless/ti/Kconfig"