netipmid: Make pam_auth configurable

Allow people to disable pam_authenticate if it is not working for their
system.

Tested:
Testing on a system with no dropbear and was able to pass the check.

Change-Id: I932830cd518b7f8ef6c828405b4959a8d14b1b58
Signed-off-by: Willy Tu <wltu@google.com>
3 files changed