Commit 7e8c53d7 removed eNET board but missed to
add eNET to README.scrapyard.
This commit adds it for the record.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Graeme Russ <graeme.russ@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>