create_wipe_tmpfs: include ply-image and remove useless items

Some old branches use ply-image instead of frecon. Include ply-image
into wipe tmpfs if there is no frecon. Also remove some useless items.

BUG=chromium:544021
TEST=Run wiping using factory-rambi-6420.B on Enguarde

Change-Id: I13df8a99a23023f3ddf05a52c27b918de171cd39
Reviewed-on: https://chromium-review.googlesource.com/307733
Commit-Ready: Shun-Hsing Ou <shunhsingou@chromium.org>
Tested-by: Shun-Hsing Ou <shunhsingou@chromium.org>
Reviewed-by: Bowgo Tsai <bowgotsai@chromium.org>
(cherry picked from commit 2669a5855b7bafa0e6ac84dd714bd18feaf8864c)
Reviewed-on: https://chromium-review.googlesource.com/309025
Reviewed-by: Shun-Hsing Ou <shunhsingou@chromium.org>
1 file changed