msm: mpq8064: Allow any client to control noise reduction parms

It was requested that any client be allowed to modify the nr
parameters. Reason for this is that there will be a separate
pc tool that will be controlling NR for demos. Also fixed a
bug with that cause s_fmt to failed with EINVAL when arguments
were valid.

Change-Id: Ie58972a036bb6637a938b48212ef85faf894002e
Signed-off-by: Terence Hampson <thampson@codeaurora.org>