Draft: s5k3l6xx: Add init and full-res regs from the Android driver

https://github.com/A20e/android_kernel_samsung_exynos7885/blob/android-9.0/drivers/media/platform/exynos/fimc-is2/sensor/module_framework/cis/fimc-is-cis-3l6-setA.h

Not meant to be merged (unless @dorota.czaplejewicz decides otherwise), but since I've diffed the register values (at least for the full res mode so far) I figured that listing it here may be useful.