arm: am57xx: cl-som-am57x: enable USB storage

Add CONFIG_USB_STORAGE to the defconfig file.

Signed-off-by: Uri Mashiach <uri.mashiach@compulab.co.il>
Reviewed-by: Tom Rini <trini@konsulko.com>

configs/cl-som-am57x_defconfig

@@ -48,4 +48,5 @@ CONFIG_TI_QSPI=y
 CONFIG_USB=y
 CONFIG_USB_XHCI_HCD=y
 CONFIG_USB_XHCI_DWC3=y
+CONFIG_USB_STORAGE=y
 CONFIG_OF_LIBFDT=y