phy: socionext: Add UniPhier PCIe PHY driver

Add PCIe PHY driver support for Pro5, LD20 and PXs3 SoCs.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
diff --git a/drivers/Kconfig b/drivers/Kconfig
index b1ada1c..c9c812b 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -80,6 +80,8 @@
 
 source "drivers/phy/marvell/Kconfig"
 
+source "drivers/phy/socionext/Kconfig"
+
 source "drivers/pinctrl/Kconfig"
 
 source "drivers/power/Kconfig"