CFBMC-5584: BMC on FAS2750 fails to load the newly installed firmware and drops to the backup firmware

Issue

• Manual BMC update is showing successful
  BMC node-1*> bmc update ftp://user@xx.xx.xx.xx/SP_FW.tar.gz -f
  Downloading package...
  Uncompressing package...(md5sum=685956db282be334bca8a89cc8a9bcf6)
  Unarchiving package...
  Confirming file sizes aren't suddenly larger...
  Installing package...
  Reprocessing configuration state...
  Cleaning up...
  BMC FW Update Successful.
  Primary firmware version 11.10
  Backup firmware version 11.7
  
  You need to reboot the BMC for the new image to take effect.
  Do you want to reboot the BMC now? (y/n): y
  
  Rebooting BMC...BMC reboot notify sent to ACP
  

• BMC booted with backup image
  Cluster::> sp show
  IP Firmware
  Node Type Status Configured Version IP Address
  ------- ----- ------ ------------ --------- ------------
  node-1 BMC online true 11.7 xx.xx.xx.xx
  

• New BMC is not functional if forced boot
  Cluster::*> system service-processor reboot-sp -image primary -node node-1
  
  Note: If your console connection is through the SP, it will be disconnected.
  Do you want to reboot the SP ? {y|n}: y
  
  Cluster::*> system service-processor show -node node-1 -instance
  
  Node: node-1
  Type of Device: BMC
  Status: online
  Is Network Configured: true
  Public IP Address: xx.xx.xx.xx
  MAC Address: d0:39:ea:xx:xx:xx
  Firmware Version: N/A
  Part Number: unknown
  Serial Number: unknown
  Device Revision: Not Applicable
  Is Firmware Autoupdate Enabled: false