drm/msm/dsi-staging: toggle phy reset disable during idle pc

enable/disable phy reset disable config when entering and coming
out of idle power collapse. And remove the register write logging
for DISP_CC registers in dsi.

Change-Id: I44fc2572eb9c228109546cffddc774c97aed47ef
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>