mb/siemens/mc_ehl2: Fix GPIO settings
With the latest hardware revision, the two GPIOs GPP_B15 and GPP_E19 are
no longer connected to a native function.
BUG=none
TEST=Checked output verbose GPIO debug messages
Change-Id: I266612f041b749aa83b366497b4211fc075c7bd7
Signed-off-by: Mario Scheithauer <mario.scheithauer@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73341
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jan Samek <jan.samek@siemens.com>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>