Fix build issue: cannot import name FW_AUTO_ERR_UKNOWN- required module not found

[Junchao-Mellanox]

Why I did it

PR sonic-net/sonic-platform-common#254 fixed a typo in sonic-platform-common, but it does not fix the same typo in Mellanox platform API. So it causes a build issue when updating sonic-platform-common submodule pointer.

==================================== ERRORS ====================================
2022-01-13T06:33:43.5047338Z ___________________ ERROR collecting tests/test_firmware.py ____________________
2022-01-13T06:33:43.5048665Z ImportError while importing test module '/sonic/platform/mellanox/mlnx-platform-api/tests/test_firmware.py'.
2022-01-13T06:33:43.5049454Z Hint: make sure your test modules/packages have valid Python names.
2022-01-13T06:33:43.5050210Z Traceback:
2022-01-13T06:33:43.5051411Z /usr/lib/python2.7/dist-packages/_pytest/python.py:450: in _importtestmodule
2022-01-13T06:33:43.5052148Z     mod = self.fspath.pyimport(ensuresyspath=importmode)
2022-01-13T06:33:43.5053548Z /usr/lib/python2.7/dist-packages/py/_path/local.py:668: in pyimport
2022-01-13T06:33:43.5054139Z     __import__(modname)
2022-01-13T06:33:43.5055087Z /usr/lib/python2.7/dist-packages/_pytest/assertion/rewrite.py:294: in load_module
2022-01-13T06:33:43.5055724Z     six.exec_(co, mod.__dict__)
2022-01-13T06:33:43.5056653Z /usr/lib/python2.7/dist-packages/six.py:709: in exec_
2022-01-13T06:33:43.5057242Z     exec("""exec _code_ in _globs_, _locs_""")
2022-01-13T06:33:43.5057736Z <string>:1: in <module>
2022-01-13T06:33:43.5058135Z     ???
2022-01-13T06:33:43.5058602Z tests/test_firmware.py:27: in <module>
2022-01-13T06:33:43.5059179Z     from sonic_platform.component import Component, ComponentSSD
2022-01-13T06:33:43.5060037Z sonic_platform/component.py:43: in <module>
2022-01-13T06:33:43.5061372Z     raise ImportError(str(e) + "- required module not found")
2022-01-13T06:33:43.5062563Z E   ImportError: cannot import name FW_AUTO_ERR_UKNOWN- required module not found
2022-01-13T06:33:43.5064027Z  generated xml file: /sonic/platform/mellanox/mlnx-platform-api/test-results.xml 

Actually this is kind of circuit dependency:

1. If we fix the typo in platform API code while do not fix typo in sonic-platform-common, the platform API PR can never pass checker
2. If we fix the typo in sonic-platform-common, the submodule pointer update PR can never pass checker

So this PR is just a workaround for this.

How I did it

Try to import the correct name first. If there is a import error, try to import the previous name.

How to verify it

Run build

Which release branch to backport (provide reason below if selected)

• 201811
• 201911
• 202006
• 202012
• 202106

Description for the changelog

A picture of a cute animal (not mandatory but encouraged)