Missing mimo channels for Bladerf

[alphafox02]

Setup: 20.04 source builds and deb packages.

Expected Result: Using bladerf, selected Mimo source and then fine doa channel.

Actual Result: Using both the latest source and deb package installs, mimo channels are no longer listed.

Temp Fix: Reverting to the deb package that specifically mentioned the doa mimo channel does in fact present the option.

Not sure what gas changed recently or why the beam steer and other channels are missing.

[f4exb]

There is a stray comma here: https://github.com/f4exb/sdrangel/blob/master/CMakeLists.txt#L103 this was missed when fixing #1310

It should be:

option(ENABLE_CHANNELMIMO "Enable channelmimo plugins" ON)

This prevents the default "ON" option to be taken into account when ENABLE_CHANNELMIMO is not set on the cmake command line which is the case when building the Ubuntu 20.04 package.

Note: same issue when compiling from source (unless the option is specified) and for Docker builds.