ANDROID: Update init/do_mounts_dm.c to the latest ChromiumOS version.

This is needed for AVB.

Bug: None
Test: Compiles.
Change-Id: I45b5d435652ab66ec07420ab17f2c7889f7e4d95
Signed-off-by: David Zeuthen <zeuthen@google.com>
Git-commit: 8f3ac4c1
Git-repo: https://android.googlesource.com/kernel/common


Signed-off-by: Channagoud Kadabi <ckadabi@codeaurora.org>