Initial config for minipack3n fw_util.json

[brandonchuang]

Description:

1. Add fw_util.json for the minipack3n fw_util.
2. This configuration has been tested on minipack3n.
3. There is an issue with the BIOS program action that needs to be clarified and confirmed.

Test Plan:

Version: fw_util --config_file=./fw_util.json --fw_action=version --fw_target_name=scm_cpld
Read : fw_util --config_file=./fw_util.json --fw_action=read --fw_target_name=scm_cpld --fw_binary_file=scm_cpld.bak
Verify : fw_util --config_file=./fw_util.json --fw_action=verify --fw_target_name=scm_cpld --fw_binary_file=scm_cpld.bak
Program: fw_util --config_file=./fw_util.json --fw_action=program --fw_target_name=scm_cpld --fw_binary_file=CPLD/mp3_scm_cpld_v2.3.0_ugd.bin

Verify if "program" is correct :
S1.read
fw_util --config_file=./fw_util.json --fw_action=read --fw_target_name=scm_cpld --fw_binary_file=scm_cpld.bak
S2.program
fw_util --config_file=./fw_util.json --fw_action=program --fw_target_name=scm_cpld --fw_binary_file=CPLD/mp3_scm_cpld_v2.3.0_ugd.bin
S3.Verify with last version
fw_util --config_file=./fw_util.json --fw_action=verify --fw_target_name=scm_cpld --fw_binary_file=scm_cpld.bak => FAIL
S4.Verify with current version
fw_util --config_file=./fw_util.json --fw_action=verify --fw_target_name=scm_cpld --fw_binary_file=CPLD/mp3_scm_cpld_v2.3.0_ugd.bin => OK

Test Log:
minipack3n-fwutil_execute_on_mp3n_log_20250304.txt

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