Add support for G/M/K suffix for params in update_firmware_vars.

BUG=chromium-os:17196
TEST=All doctests pass with "./update_firmware_vars.py --test -v"
TEST=Tried running like this and saw the right size get output.
  update_firmware_vars.py -i /tmp/foo.bin --fw-size=4M

Change-Id: I8b2efd12ff13c42349435b0d56bb3eb2fa422553
Reviewed-on: http://gerrit.chromium.org/gerrit/4176
Tested-by: Doug Anderson <dianders@chromium.org>
Reviewed-by: Nick Sanders <nsanders@chromium.org>
1 file changed