staging: wicl1000: isr_uh_routine: use netdev private wilc

Use netdev private member wilc instead of g_linux_wlan and change argument wilc
with dev in the function request_threaded_irq to pass back to handler
the function isr_uh_routine.

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