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/sama5d2_ptc_nandflash_defconfig b/configs/sama5d2_ptc_nandflash_defconfig
index fce501b..d65aed0 100644
--- a/configs/sama5d2_ptc_nandflash_defconfig
+++ b/configs/sama5d2_ptc_nandflash_defconfig
@@ -11,3 +11,5 @@
 CONFIG_CMD_SF=y
 # CONFIG_CMD_FPGA is not set
 CONFIG_SPI_FLASH=y
+CONFIG_USB=y
+CONFIG_USB_STORAGE=y