soc/amd/picasso/fch: remove comment about ForceStpClkRetry
The corresponding bit is marked as reserved in the PPR. Also there's no
BKDG for Picasso any more; the BKDG was mostly replaced by the PPR. Also
fix the style of the comment.
Change-Id: Iffdbb9e951cb140e4352ab0f198f72a71ba798dc
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50495
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>