Instead of looping through all CRTCs, update DDL for current CRTC for which
watermark is being updated.
CHV is confirmed to have precision of 32/64 which is same as VLV.
Reviewed-by: NImre Deak <imre.deak@intel.com>
Signed-off-by: NGajanan Bhat <gajanan.bhat@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>