vendorcode/siemens: Add new values to hwilib

The Siemens mc_apl1 mainboard needs new values from hwilib.

- add Dsave time for board reset
- add backlight brightness for panel setting
- add backlight PWM period

Change-Id: I3a48654ef57c7f8accaabe60e8aec144e4fe5466
Signed-off-by: Mario Scheithauer <mario.scheithauer@siemens.com>
Reviewed-on: https://review.coreboot.org/20159
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2 files changed