broadwell: Clean up the bootblock code

- Use the PCI device ID macros for device addressing
- Use the IO map defines from broadwell/iomap.h
- Clean up some macro defines that were renamed
- Clean up comments

BUG=chrome-os-partner:28234
TEST=None

Change-Id: I2c1e0bc397f6a58fb51406835a9aa37f1c049b0a
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/198925
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
4 files changed