staging: wilc1000: rename ReqIEsLen in struct connec_info

This patch renames ReqIEsLen to req_ies_len to avoid camelcase.

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