lynxpoint: Fix up handling for LynxPoint-LP chipsets

This configures power management registers according to
the 1.2.0 reference code drop.  There are many inconsistencies
with the documentation and I tried to note those with ?.

This does not do the same for LynxPoint-H yet.

Change-Id: I9b8f5c24a8b0931075a44398571c9b0d54cce6a6
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/2819
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
1 file changed