drm/msm: drop register logging support

drm/msm: drop register logging support

Register logging was used during early stages of msm driver development
to compare upstream and downstream register traces. However the tool was
never updated to work with mdp5 hardware. Later it was dropped
completely when Rob imported freedreno tools into mesa. All this makes
DRM_MSM_REGISTER_LOGGING irrelevant now, so it can be dropped.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20220105232700.444170-1-dmitry.baryshkov@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>