Update get_dvb_firmware script for the new location of the 
tda10046 firmware.

The old location doesn't work anymore.
Signed-off-by: NAndreas Arens <ari@goron.de>
Signed-off-by: NMichael Krufky <mkrufky@linuxtv.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>