Details: This change is to allow the kickstart looking for the
right pxe boot directory in 21.12 for 22.12 upgrade
Test Plan:
PASS: 22.12 Debian is installed on both controllers
Task: 46968
Story: 2009303
Signed-off-by: Junfeng (Shawn) Li <junfeng.li@windriver.com>
Change-Id: I3401a25d41dd3af2c63fdb90c83316a35a9733d0