This patch is for display driver of EXYNOS SoC.

[1/4]: ARM: EXYNOS: definition of system registers - to contorl FIMD of LBLK0 bypass selection, add missed definitions of system register [2/4]: ARM: EXYNOS: add data structure for EXYNOS display driver - It is needed to specific vidinfo_t data structure for EXYNOS display driver. [3/4]: ARM: EXYNOS: add exynos lcd clock interface - Is is newly defined to interface to get lcd source clock. [4/4]: ARM: EXYNOS: support EXYNOS display driver

change of v1: - move system register control function to system.c - move lcd clock control function to clock driver - remove private debug macro - etc

Thank you, Donghwa Lee