This common utility would set next boot option as onie mode and
when reboot is triggered it would reboot the box into that specific onie mode.
Current support modes are rescue/install/uninstall
* This method is used to update firmware components such as CPLD,FPGA,BIOS,SMF
* This uses ONIE firmware upgrade design to stage firmware update from NOS.
a) Copy latest firmware updater image to target running sonic.
b) Run “./fw-updater -u onie-firmware-x86_64-dellemc_s5200_c3538-r0.3.40.5.1-9.bin”.
c) This would automatically reboot ONIE into update mode and update firmware components to latest and reboot back to sonic without any user intervention.
Signed-off-by: Srideep Devireddy <srideep_devireddy@dell.com>
