[coreboot] CAR vs. non-CAR ck804 bringup

[Myles Watson]

I'd like to unify the ck804_early_setup[_car].c files.  The differences are
very minor, as you can see from ck804.  This patch applies after removing
the CK804B defines since they are copies of other defines (with the same
values) car_white.diff.

Questions:
1. What is PANTA, and why is it commented out in CAR but enabled in the
other?
2. Why was SATA on dev 7 enabled in non-CAR but not CAR?

I've tried it out on the s2892, but since I don't know exactly what to
test...

Signed-off-by: Myles Watson

Thanks,
Myles