V4L/DVB (8599): au8522: remove if frequency settings from vsb/qam modulation tables

Since IF frequency is set after the vsb/qam modulation tables are written,
remove the redundant register settings from the vsb/qam modulation tables.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>