ARM: UniPhier: enable USB features

FAT-formated USB storage device access is available.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/configs/ph1_sld8_defconfig b/configs/ph1_sld8_defconfig
index 4e8f354..6510937 100644
--- a/configs/ph1_sld8_defconfig
+++ b/configs/ph1_sld8_defconfig
@@ -8,4 +8,7 @@
 CONFIG_NAND_DENALI_SPARE_AREA_SKIP_BYTES=8
 CONFIG_DM_SERIAL=y
 CONFIG_UNIPHIER_SERIAL=y
+CONFIG_USB=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_STORAGE=y
 S:CONFIG_SPL_NAND_DENALI=y