I got it working finally ..
sudo dmesg -t | grep dvb
[ 31.201602] mn88473 4-0018: Direct firmware load for dvb-demod-mn88473-01.fw failed with error -2
[ 31.201653] mn88473 4-0018: firmare file 'dvb-demod-mn88473-01.fw' not found
cd /lib/firmware/
sudo wget
http://palosaari.fi/linux/v4l-dvb/firmware/MN88473/01/latest/dvb-demod-mn88473-01.fw
sudo reboot
Checking:
$ sudo dmesg -t | grep dvb
usb 1-1.3: Product: dvbt2
usb 1-1.3: Manufacturer: astrometadvbt2
usb 1-1.3: dvb_usb_v2: found a 'Astrometa DVB-T2' in warm state
usb 1-1.3: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer
usb 1-1.3: dvb_usb_v2: schedule remote query interval to 200 msecs
input: MCE IR Keyboard/Mouse (dvb_usb_rtl28xxu) as /devices/virtual/input/input1
rc rc0: lirc_dev: driver ir-lirc-codec (dvb_usb_rtl28xxu) registered at minor = 0
usb 1-1.3: dvb_usb_v2: 'Astrometa DVB-T2' successfully initialized and connected
usbcore: registered new interface driver dvb_usb_rtl28xxu
w_scan -fc -c PL > channels.conf
After starting up tvheadend now it sees that adapter that DVB-C.