Removable_storage : fix and sync up to Samus EVT2 factory branch

Fix the correct code for previous updates.

self.bft_fixture --> self.args.bft_fixture

which is synced up with Samus EVT2 factory branch.

BUG=None
TEST=test by Samus Dolphin Uno fixture.

Change-Id: Ic5292513421c64dd8a62ace09be193681b6b1e38
Reviewed-on: https://chromium-review.googlesource.com/227009
Reviewed-by: Wei-Ning Huang <wnhuang@chromium.org>
Commit-Queue: Pin-chih Lin <johnylin@chromium.org>
Tested-by: Pin-chih Lin <johnylin@chromium.org>
1 file changed