ARM: EXYNOS: support MIPI DSI interface driver

EXYNOS SoC platform has MIPI-DSI controller and MIPI-DSI
based LCD Panel could be used with it. This patch supports MIPI-DSI driver based Samsung SoC chip.

LCD panel driver based MIPI-DSI should be registered to MIPI-DSI driver at board file and LCD panel driver specific function registered to mipi_dsim_ddi structure at lcd panel init function called system init.
In the MIPI-DSI driver, find lcd panel driver by using registered lcd panel name, and then initialize lcd panel driver.

This patch set has take a dependency on some patch set that I had already sended.

[PATCH v3 1/4] ARM: EXYNOS: definition of system registers
- updated Makefile
[PATCH v3 3/4] ARM: EXYNOS: add exynos lcd clock interface
- updated setting mipi dsi clock
[PATCH v3 4/4] ARM: EXYNOS: support EXYNOS display driver
- to interface mipi dsi, add mipi dsi init function in exynos_fb.c and add vidinfo_t field to notify to use mipi dsi interface.

Hi,
I will abandon this patch set because of some dependency on previously sended patch set and update next version.

Thank you.