configs: Migrate CONFIG_USB_STORAGE

In some cases we were missing CONFIG_USB=y so enable that when needed.

Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/M5475BFE_defconfig b/configs/M5475BFE_defconfig
index 5c2d31b..fa5e1e1 100644
--- a/configs/M5475BFE_defconfig
+++ b/configs/M5475BFE_defconfig
@@ -10,3 +10,5 @@
 CONFIG_CMD_MII=y
 CONFIG_CMD_PING=y
 CONFIG_CMD_CACHE=y
+CONFIG_USB=y
+CONFIG_USB_STORAGE=y