staging: wilc1000: change parameter type of hif_init

This patch changes parameter type wilc_wlan_inp_t with struct wilc and
modify it's related code. Pass wilc to the functions as well.
wilc will be used in later patch.

Signed-off-by: Glen Lee <glen.lee@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>