Hantek 6022BL support

libsigrok now supports the Hantek 6022BL device.

This is a 2-channel USB oscilloscope (48MHz sampling rate, 20MHz analog bandwidth as per vendor); it can also be used as a 24MHz logic analyzer alternatively (but not both at the same time).

We use our open-source sigrok-firmware-fx2lafw firmware for the device, which has been extended to also support the Hantek 6022BL (it supported the Hantek 6022BE already since 0.1.4).

With some additional changes in libsigrok, the Hantek 6022BL is now officially supported.

The respective code was contributed by Sebastian Tabares Amaya and Jan Losinski, thanks a lot!

For the curious, we have the usual set of teardown photos and hardware info in the wiki.