Always mount ESP as read-write

The mount command for the ESP partition now explicitly uses no
options, ensuring it is always mounted as read-write.

BUG=none
TEST=builders/CQ

Change-Id: I08ed97e82164b696afbda401224c2bfe97cc3476
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/6840121
Auto-Submit: Jae Hoon Kim <kimjae@chromium.org>
Tested-by: Jae Hoon Kim <kimjae@chromium.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
1 file changed