Implements variable delay tuning. In this change, exynos host can
determine the correct sampling point for the HS200 and SDR104 speed mode.
Signed-off-by: NSeungwon Jeon <tgih.jun@samsung.com>
Tested-by: NAlim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: NChris Ball <cjb@laptop.org>