[PATCH] dvb: tda1004x DVB frontend update

From: Michael Hunold <hunold@linuxtv.org>

- tda1004x: standardised where the firmware should be.

- tda1004x: need to re-invert inversion for tda10046 in get_fe()

- tda1004x: reset chip before uploading firmware

- tda1004x: split firmware upload off from frontend init.  the initial tune
  attempt was taking too long.  provide explanation of tuner frequency
  calculations

- tda1004x: Fixed signal strength reading for tda10046h