drm/exynos: dsi: make use of driver data for static values

Exynos MIPI DSI driver uses some static values such as address offsets,
register setting values, and etc. This patch makes the driver get those
values from the driver data.

Signed-off-by: Hyungwon Hwang <human.hwang@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>