sb/intel/i82801dx: Drop unneeded PM2 settings from FADT

The PM2_CNT register block is not present on this southbridge, as per
Intel Document 290744 (ICH4 datasheet). Also, the ACPI specification,
version 6.3, section 4.8.1.3 (PM2 Control Register), says:

 This register block is optional, if not supported its block pointer and
 length contain a value of zero.

Since the FADT struct defaults to zero in coreboot, we don't need to do
anything to indicate PM2_CNT is not supported. So, drop unneeded values.

Also delete a comment about `pm2_cnt_len`, which said that the right
value differs from zero. Looks like that comment was wrong instead.

Change-Id: Icbb32f5db7b368c764b3477c40f8ae9c788df5ee
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43383
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions