V4L/DVB (7660): bsbe1: Use settings recommended by the manufacturer

Reworked the BSBE1 tuner support in bsbe1.h to follow
the ALPS-recommended parameters more closely.

Tested with BSBE1-based Activy cards and TT DVB-S rev 2.3.

Signed-off-by: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>