phy: add USB PHY driver for MediaTek MT7620 SoC

This patch adds USB PHY driver for MediaTek MT7620 SoC

Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index d12a6b0..ab638f0 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -218,6 +218,13 @@
 
 	  This PHY is found on some Keystone (K2) devices supporting USB.
 
+config MT7620_USB_PHY
+	bool "MediaTek MT7620 USB PHY support"
+	depends on PHY
+	depends on SOC_MT7620
+	help
+          Support the intergated USB PHY in MediaTek MT7620 SoC
+
 config MT76X8_USB_PHY
 	bool "MediaTek MT76x8 (7628/88) USB PHY support"
 	depends on PHY