There is no functional change on this patch.  Only rename several
hdmi encoder function name which suppose to use only by valleyview from
intel_hdmi_pre_pll_enable to vlv_hdmi_pre_pll_enable, and etc.
Signed-off-by: NChon Ming Lee <chon.ming.lee@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>