In general pinconf belongs in board files, not SoC files.  Move it to
the only current user (trogdor).  Also adjust the drive strengths and
pulls.

Cc: V Sujith Kumar Reddy <vsujithk@codeaurora.org>
Cc: Srinivasa Rao Mandadapu <srivasam@codeaurora.org>
Cc: Tzung-Bi Shih <tzungbi@chromium.org>
Cc: Judy Hsiao <judyhsiao@chromium.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20210301133318.v2.2.Id27e7e6f90c29bf623fa4880e18a14ba1dffd2d2@changeidSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>