accton/as7726-32x: Modify onlpdump -x output format and support show MFU ver

[rayxhuangEC]

What did I do

• Sync [ACCTON][AS7726-32X] Modify the version display for command onlpdump -x #12
• Sync [Accton][AS7726-32X] Show MFU ver with onlpdump -x #162

Output

root@localhost:~# onl-platform-show
Model: AS7726-32X
Manufacturer: Accton
Ports: 32 (32x100)
Platform Revision: r0
System Object Id: 1.3.6.1.4.1.42623.1.1.2.259.7726.32
System Information:
    DMI BIOS Version: v48.02.01.00
    DMI System Version: R02A
root@localhost:~# onlpdump -x
        CPLD Versions:
           CPU CPLD(0x65): FFFFFFFA
           Main CPLD(0x60): 0F
           Main CPLD(0x62): 8E
           Main CPLD(0x64): 8E
           Fan CPLD(0x66):
        Other Versions:
           BIOS: v48.02.01.00
           ONIE: 2022.08.00.04
           MFU:
root@localhost:~# ls /var/tmp/last_updated_MFU_version
ls: cannot access '/var/tmp/last_updated_MFU_version': No such file or directory
root@localhost:~# echo 0x11 > /var/tmp/last_updated_MFU_version
root@localhost:~# onlpdump -x
        CPLD Versions:
           CPU CPLD(0x65): FFFFFFFA
           Main CPLD(0x60): 0F
           Main CPLD(0x62): 8E
           Main CPLD(0x64): 8E
           Fan CPLD(0x66):
        Other Versions:
           BIOS: v48.02.01.00
           ONIE: 2022.08.00.04
           MFU: 0x11