Add bias-T support for RTL-SDR about urh HOT 7 CLOSED

Looks like we should manipulate by GPIO#0 with standard rtl-sdr library's func: rtlsdr_set_bias_tee_gpio():

https://github.com/osmocom/rtl-sdr/blob/master/src/rtl_biast.c

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As long as the driver/API supports this setting, this shouldn't be a problem. I think, the challenging point is that it has to be a generic solution for URH, i.e. work with ALL RTL-SDR devices. Thus the driver must be able to identify whether the used RTL-SDR is suitable.

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Open pull request:

#1056

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Hey, thanks for opening that pull request. I will have a look but I currently do not have a RTLSDR with me to verify that the code doesn't break anything.

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Great, don't hesitate to contact me if you need some assistance for verifying it
Thanx!

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Hey @jirjirjir
there was an error in the ci.yml that made your checks fail. Could you make a new PR with the current master?

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Hi!

Done:
#1057

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