siemens/mc_tcu3: Set GPIO_S0_SC[75] to output

The usage of the pin has changed and therefore this pin needs
to be set up as output and drive low initially.

Change-Id: Ie3eb9cc703f7f73d59fad52ea9e514997d84606a
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/12754
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
1 file changed