The tuning logic is broken with regards to status report:
it relies on a previously-cached value that may not be valid
if re-tuned.

Change the logic to always read the status.
Acked-by: NDaniel Scheller <d.scheller@gmx.net>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>