New protocol decoder: adf435x

libsigrokdecode now features yet another protocol decoder. This time: adf435x.

This decoders supports the SPI-based protocol of the Analog Devices ADF4350 and ADF4351 RF synthesizers.

The decoder was contributed by Joel Holdsworth, thanks a lot!

You can watch episode 005 ("4.4GHz RF Synthesizer Board - ADF4351 - Theory, Setup, Reverse Engineering, Experiments") on Joel's OpenTechLab YouTube channel for a lot more details about the ADF435x devices and how they can be used, as well as how sigrok can help with making chip-specific protocols like this one easier to understand and debug.