NFC: fdp: Remove __func__ from dev_dbg()

Remove redundant __func__ parameter from dev_dgb() calls and
delete empty dev_dbg() trace calls, which are redundant if
function tracer is enabled.

Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>