[sonic-pcie] Add unit testcases for pcie_common.py#293

sujinmkang merged 1 commit intosonic-net:mastersonic-net/sonic-platform-common:masterfrom

ArunSaravananBalachandran:pcie_common_UTArunSaravananBalachandran/sonic-platform-common:pcie_common_UTCopy head branch name to clipboard