staging: wilc1000: fix build error on SPI

wilc_netdev_init function has parameters to pass but no argument is passed
when bus type SPI is selected. Which causes build error.
This patch passes argument &wilc to the function wilc_netdev_init.

Signed-off-by: Glen Lee <glen.lee@atmel.com>
Fixes: 12ba5416 ("staging: wilc1000: assign pointer of g_linux_wlan to sdio device data")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>