Add support for the "Mygica T230C v2" into the "dvbsky" driver. A small enhancement in the si2168 demodulator driver is also needed, and a USB device ID in dvb-usb-ids.h .
This is v3.6 of proposed patch, based on work from an anonymous author, and with feedback from Sean Young and Antti Palosaari. Tested by patch author on DVB-(T/T2/C). Tested by Frank Rysanek: can tune into locally available DVB-T and DVB-T2 muxes, video and audio playback works. Applies cleanly against Linux 5.2 .
