With a redesign of mc_ehl2 the used RTC was changed. In order to be able
to select a different RTC type for every variant move the RTC Kconfig
switch into the variant's Kconfig file.
Change-Id: Ia24703ede6a935e3b9886df87237857baec7d6a0
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67100
Reviewed-by: Mario Scheithauer <mario.scheithauer@siemens.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
d518c6593c