Fixup pagefault issue of mixer driver
- it makes sure to check shadow register for interlace scan.
- it corrects chroma_addr[1], height and vertical position values.
And trivial cleanup
- it just removes duplicated drm_bridge_attach.
* tag 'exynos-drm-fixes-for-v4.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos:
drm/exynos: hdmi: avoid duplicating drm_bridge_attach
drm/exynos: mixer: avoid Oops in vp_video_buffer()
drm/exynos/mixer: fix synchronization check in interlaced mode