Integrate meta-seco-rk/u-boot-seco-rk/seco_2017.09_next_logo

Commit: edgehog/layers/seco/meta-seco-rk@89b629ee

Integrate u-boot-seco-rk/seco_2017.09_next_logo

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Commit: edgehog/bsp/rockchip/u-boot-seco-rk@cc1d6744

[DRM][LOGO] Avoid usage of flush_dcache_range

For some reason, probably related to cache alignment issues, flush_dcache_range sometimes crashes. To avoid this, we use flush_dcache_all() which invalidates the entire dcache, but never crashes.