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/ecovec_defconfig b/configs/ecovec_defconfig
index a23f52a..e3c0b36 100644
--- a/configs/ecovec_defconfig
+++ b/configs/ecovec_defconfig
@@ -24,4 +24,6 @@
 # CONFIG_CMD_MISC is not set
 CONFIG_CMD_EXT2=y
 CONFIG_CMD_FAT=y
+CONFIG_USB=y
+CONFIG_USB_STORAGE=y
 CONFIG_USE_PRIVATE_LIBGCC=y