board: tegra124: switch to updated pre-dm i2c write

Configure PMIC for early stages using updated i2c write.

Tested-by: Thierry Reding <treding@nvidia.com> # Jetson TK1 T124
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom <twarren@nvidia.com>