Add IDs of some SNB and Haswell chips; use more descriptive names. Add PCIEXBAR and PXPEPBAR read support for SNB/IVB/Haswell. Change-Id: I16753bf90061fc2065b813b1c2169e7b7bcc89e8 Signed-off-by: Felix Held <felix-coreboot@felixheld.de> Reviewed-on: http://review.coreboot.org/7360 Reviewed-by: Patrick Georgi <pgeorgi@google.com> Tested-by: build bot (Jenkins) Reviewed-by: Mathias Krause <minipli@googlemail.com>