soc/amd/stoneyridge: Add generic PM1 register clear function

Convert vboot_platform_prepare_reboot() to call a function in
soc//stoneyridge.  A subsequent patch will add another call to
the new function, and this change removes any inference of a
dependency on vboot.

BUG=b:122725586

Change-Id: I634fcd030e206c790bda697a3dbef4e8cc21b3a8
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://review.coreboot.org/c/31159
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

0 files changed, 0 insertions, 0 deletions