cros_bundle_firmware: Move default flashmaps into a separate file

To avoid growing the main bundle firmware Python module even more,
factor out the default flash maps into a separate module.

BUG=chromium:214441
TEST=manual
   . building firmware images for rambi, nyan_big and peach_pi still succeeds

Change-Id: I4699920d2f1bbbb3411f385d743fdd9dbdd0ffe6
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/198546
Reviewed-by: Simon Glass <sjg@chromium.org>
2 files changed