misc: mic: remove unneeded debug message

>From the error path we are printing an error message with dev_err(). No
need to print almost same message with dev_dbg().

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Reviewed-by: Sudeep Dutt <sudeep.dutt@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>