Removed a20 in description, since it
only works for a10, a13 and a31.
Also refreshed kernel config.
Fixes: #10466
Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>
(moved fixes, refreshed, added CONFIG_DVB_USB=n)
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>