phy: socionext: Add UniPhier USB3 PHY driver

Add USB3 PHY driver support to control clocks and resets needed to enable
PHY. The phy_ops->init() and exit() control PHY clocks and resets only,
and clocks and resets for the controller and the parent logic are enabled
in advance.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Reviewed-by: Marek Vasut <marex@denx.de>
diff --git a/drivers/phy/socionext/Makefile b/drivers/phy/socionext/Makefile
index 5484360..94d3aa6 100644
--- a/drivers/phy/socionext/Makefile
+++ b/drivers/phy/socionext/Makefile
@@ -4,3 +4,4 @@
 #
 
 obj-$(CONFIG_PHY_UNIPHIER_PCIE)	+= phy-uniphier-pcie.o
+obj-$(CONFIG_PHY_UNIPHIER_USB3)	+= phy-uniphier-usb3.o