sigrok-fwextract-kingst-la2016: fix fpga bitstream extraction, add device support
Firmware extraction is trivially broken, probably due to a change of stream name
in the vendor resource file. Fixed that issue and also extracted more files to
support different hardware variations; the two existing hardware revisions of
LA2016 & LA1016 each require different bitstreams. The crc32 of extracted
files is now shown to help track any vendor changes.