This patch adds a driver for a new RTC from Micro Crystal. Supported
features are:
* configure backup voltage switchover via devicetree
* configure backup capacitor charging mode via devicetree
* set date if a voltage drop on backup voltage was detected
to either a user definable (devicetree) or coreboot build date
Change-Id: I37176ea726e50e4e74d409488981d7618ecff8bb
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67099
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Mario Scheithauer <mario.scheithauer@siemens.com>
