Properly handle incorrect CLI arguments in tt-smi

[hmohiuddinTT]

Tried to run tt-rmi -r with multiple device ids but the program crashed. Should do some argparsing and fail gracefully with a cleaner error message.

[sbansalTT]

Looks like there is a device id 8 doesn't exist on the pci bus. Could you remove it and try again?
But, I will also add a cleaner exit when the device isn't found - to make it easier for user to debug

[hmohiuddinTT]

Oh yeah I didn't even realize I added an extra device, but yeah we should still handle it gracefully.

[warthog9]

more try/except blocks! ;-)