configs: am335x_evm_usbspl: Add CONFIG_SPL_NET_VCI_STRING

Add CONFIG_SPL_NET_VCI_STRING to enable USB-Ethernet boot mode
support.

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

configs/am335x_evm_usbspl_defconfig

@@ -12,6 +12,7 @@ CONFIG_ARCH_MISC_INIT=y
 CONFIG_SPL=y
 CONFIG_SPL_MUSB_NEW_SUPPORT=y
 CONFIG_SPL_NET_SUPPORT=y
+CONFIG_SPL_NET_VCI_STRING="AM335x U-Boot SPL"
 CONFIG_SPL_OS_BOOT=y
 CONFIG_SPL_USB_GADGET_SUPPORT=y
 CONFIG_SPL_USBETH_SUPPORT=y