staging: wilc1000: renames struct connect_resp_info variables

This patch renames to avoid camelcase changes follow are:
 - pu8IEs to ies
 - u16IEsLen to ies_len

Signed-off-by: Leo Kim <leo.kim@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>