drm/msm/hdmi: use bulk regulator API

Switch to using bulk regulator API instead of hand coding loops.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Abhinav Kumar <abhinavk@codeaurora.org>
Link: https://lore.kernel.org/r/20211015001100.4193241-1-dmitry.baryshkov@linaro.org


Signed-off-by: Rob Clark <robdclark@chromium.org>