nyan: add eeprom support

This will be needed for eventlogging, and is required for some
portions of FAFT. The command is already hooked up in the platform
callbacks, so this makes it actually work.

TEST="mosys eeprom map" works on nyan

Change-Id: I44476cef08a63bef6377eb3fb2759439603dcaea
Reviewed-on: https://chromium-review.googlesource.com/182882
Reviewed-by: Shawn Nematbakhsh <shawnn@chromium.org>
Tested-by: David Hendricks <dhendrix@chromium.org>
Commit-Queue: David Hendricks <dhendrix@chromium.org>
3 files changed