drm/exynos: Implement drm_connector directly in dp driver

This patch implements drm_connector directly in the dp driver, this will
allow us to move away from the exynos_drm_connector layer.

Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

diff --cc drivers/gpu/drm/exynos/exynos_dp_core.c
Simple merge

diff --cc drivers/gpu/drm/exynos/exynos_dp_core.h
Simple merge