ARM: uniphier: enable generic EHCI driver for uniphier_v8_defconfig

The LD11 SoC is equipped with USB EHCI controllers.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/configs/uniphier_v8_defconfig b/configs/uniphier_v8_defconfig
index a8f2816..9554ae0 100644
--- a/configs/uniphier_v8_defconfig
+++ b/configs/uniphier_v8_defconfig
@@ -31,4 +31,6 @@
 CONFIG_USB=y
 CONFIG_USB_XHCI_HCD=y
 CONFIG_USB_XHCI_DWC3=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_GENERIC=y
 CONFIG_USB_STORAGE=y