arndale-octa: point to correct DTB: exynos5420-arndale-octa.dtb
arndale-octa: point to correct DTB: exynos5420-arndale-octa.dtb

Signed-off-by: Koen Kooi <42e3d96910f922bdd7dd1805fe3f8aff634f391d@dominion.thruhere.net>

koenkooi/meta-dominion