ARM: Samsung: Add Exynos5422-based Odroid HC2 support

Odroid HC2 board is based on Odroid XU4 board, like the Odroid HC1.

The linux kernel does not provide a hc2 DTB so the hc1 DTB is also used
for the Odroid HC2.

Resend because MUA changed whitespace.

Signed-off-by: Dirk Meul <dirk.meul@rwth-aachen.de>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>