nb/intel/sandybridge: Add a bunch of MCHBAR defines

While we are at it, also:
- Rename related variables to match the register names.
- Update some comments to better reflect what some registers are about.
- Add various FIXME comments on registers that seem to be used wrongly.

With BUILD_TIMELESS=1, this commit does not change the coreboot build of:
- Asus P8H61-M PRO with native raminit.
- Gigabyte GA-H61MA-D3V with native raminit.
- Lenovo Thinkpad X230 with native raminit.
- Lenovo Thinkpad X220 with MRC raminit.

Change-Id: I5e5fe56eaa90842dbbdd1bfbbcb7709237b4c486
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38036
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

0 files changed, 0 insertions, 0 deletions