Drop unused eeprom code

Drop the eeprom...firmware_rom_size() functions and a few unused header
files. These are not used anymore.

BUG=chromium:990438
TEST=emerge-sarien sys-apps/mosys

Change-Id: I4f5cd0847b4361525a3706dee0916a63bb2546ca
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/mosys/+/1733684
Reviewed-by: Jason Clinton <jclinton@chromium.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
4 files changed