staging: wilc1000: handle_cfg_param: remove unnecessary whitespace

This patch removes unnecessary whitespace before a quoted newline found
by checkpatch
WARNING: unnecessary whitespace before a quoted newline

Signed-off-by: Chaehyun Lim <chaehyun.lim@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>