ARM: multi_v7_defconfig: Enable OHCI on exynos SoCs

Enable the USB OHCI driver for Exynos SoCs: S5PV210, Exynos4 family,
Exynos5250, Exynos5440 and Exynos542x/5800 family.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Reviewed-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>