Software report unplugged in NVMe devices

[thangtran-ampere]

Hi all,

When I try to use phosphor-nvme to read the temperature of NVMe devices, I saw that the system report information on all of NVMe devices which are defined in nvme_config.json file (unplugged in NVMe devices are reported wrong information).
I think this action is redundant. I workaround to fix this problem by check the result of getNVMeInfobyBusID function before request updated information in readNvmeData function.

What do you think about this issue and my solution?

For more information, I don't define the present/power good pins in nvme_config.json file.

Thanks,
Thang Tran