staging: wilc1000: rename strInterfaceInfo in the sturct wilc

This patch renames strInterfaceInfo in the struct wilc to the vif. In
addition, unnecessary print statements around it are removed in this patch.

Signed-off-by: Tony Cho <tony.cho@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>