ARM: multi_v7_defconfig: Enable USB3503 driver

The Odroid U3 (Exynos 4412 based) for instance needs this driver,
otherwise its USB hub will not come up.

Also selecting it as built-in to allow booting from USB without
an initrd/initramfs.
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

arch/arm/configs/multi_v7_defconfig

@@ -693,6 +693,7 @@ CONFIG_USB_MUSB_HDRC=m
 CONFIG_USB_MUSB_SUNXI=m
 CONFIG_USB_DWC3=y
 CONFIG_USB_DWC2=y
+CONFIG_USB_HSIC_USB3503=y
 CONFIG_USB_CHIPIDEA=y
 CONFIG_USB_CHIPIDEA_UDC=y
 CONFIG_USB_CHIPIDEA_HOST=y