drm/msm/dp: enhance debug info related to dp phy

DP phy should be initialized and exited symmetrically to avoid
clock being stucked at either on or off error. Add debug info
to cover all DP phy to identify clock issues easily.

Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/1643828199-8564-3-git-send-email-quic_khsieh@quicinc.com


Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>