V4L/DVB (6661): Remove firmware reload hack for analog

On some cases, xc2028/xc3028 wents into "turn off" mode. It seems that this
happens when very weak signals are tuned. To solve this, specific standard
reaload were done previously. Christopher patches changed this behavior to a
complete firmware reload.

This patch removes the hack. A much cleaner solution for this trouble is just
to sent a xc2028/3028 software reset.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>