[SRU] usrpctl fails to run

[ Impact ]

usrpctl will fail to run with the error:

$ usrpctl
Traceback (most recent call last):
  File "/usr/bin/usrpctl", line 15, in <module>
    import uhd
ModuleNotFoundError: No module named 'uhd'

The error is because its missing one of the runtime dependencies.

[ Test Plan ]

1. install uhd-host
2. execute usrpctl

If the package is not fixed it will result in the above error.

With the fixed package it will print:
$ usrpctl
No USRP found to act on (id=None)

We can also see the output from "usrpctl --help".

But this is an USRP Hardware Driver Peripheral Configuration Tool, so ideally someone with the hardware should test.

[ Where problems could occur ]

There is no change in code and it only fixes a runtime dependency and so imho, there is very little chance of any regression.

[ Original Bug Description ]

usrpctl fails to run with the error:

$ usrpctl
Traceback (most recent call last):
  File "/usr/bin/usrpctl", line 15, in <module>
    import uhd
ModuleNotFoundError: No module named 'uhd'