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/pcm030_LOWBOOT_defconfig b/configs/pcm030_LOWBOOT_defconfig
index 6205aa3..ddf7dde 100644
--- a/configs/pcm030_LOWBOOT_defconfig
+++ b/configs/pcm030_LOWBOOT_defconfig
@@ -8,4 +8,6 @@
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_MII=y
+CONFIG_USB=y
+CONFIG_USB_STORAGE=y
 CONFIG_OF_LIBFDT=y