arm64: defcondfig: Enable USB ACM and FTDI drivers

Enable USB serial drivers to provide UART access to various development
boards from an ARM64 host.
Reviewed-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NBjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20200703185354.1814337-1-bjorn.andersson@linaro.orgSigned-off-by: NBjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/configs/defconfig

@@ -709,6 +709,7 @@ CONFIG_USB_OHCI_EXYNOS=y
 CONFIG_USB_OHCI_HCD_PLATFORM=y
 CONFIG_USB_RENESAS_USBHS_HCD=m
 CONFIG_USB_RENESAS_USBHS=m
+CONFIG_USB_ACM=m
 CONFIG_USB_STORAGE=y
 CONFIG_USB_MUSB_HDRC=y
 CONFIG_USB_MUSB_SUNXI=y
@@ -718,6 +719,8 @@ CONFIG_USB_CHIPIDEA=y
 CONFIG_USB_CHIPIDEA_UDC=y
 CONFIG_USB_CHIPIDEA_HOST=y
 CONFIG_USB_ISP1760=y
+CONFIG_USB_SERIAL=m
+CONFIG_USB_SERIAL_FTDI_SIO=m
 CONFIG_USB_HSIC_USB3503=y
 CONFIG_NOP_USB_XCEIV=y
 CONFIG_USB_GADGET=y