[media] add a driver for mb86a20s

This adds the trivial bits to mb86a20s. As the driver won't touch
at the channel/layer parameters, this may not be enough for
receiving all channels, especially ISDB-Tsb, but the driver worked
properly for receiving video channels on my tests.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/dvb/frontends/Makefile b/drivers/media/dvb/frontends/Makefile
index 48b9fd3..b1d9525 100644
--- a/drivers/media/dvb/frontends/Makefile
+++ b/drivers/media/dvb/frontends/Makefile
@@ -81,4 +81,5 @@
 obj-$(CONFIG_DVB_EC100) += ec100.o
 obj-$(CONFIG_DVB_DS3000) += ds3000.o
 obj-$(CONFIG_DVB_MB86A16) += mb86a16.o
+obj-$(CONFIG_DVB_MB86A20S) += mb86a20s.o
 obj-$(CONFIG_DVB_IX2505V) += ix2505v.o