staging: wilc1000: add parameter name to function definition

Add missing parameter name to fix the following checkpatch.pl warning:

WARNING: function definition argument 'struct device *' should also have
an identifier name

Signed-off-by: Dmitriy Cherkasov <dmitriy@oss-tech.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>