wimax/i2400m: i2400m_schedule_work() doesn't need i2400m->work_queue

By mistake, the BUG_ON() check was left in there and it will fail when
called if i2400m->work_queue is still not setup.

Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
diff --git a/drivers/net/wimax/i2400m/driver.c b/drivers/net/wimax/i2400m/driver.c
index 006eb12..897794c 100644
--- a/drivers/net/wimax/i2400m/driver.c
+++ b/drivers/net/wimax/i2400m/driver.c
@@ -180,7 +180,6 @@
 	int result;
 	struct i2400m_work *iw;
 
-	BUG_ON(i2400m->work_queue == NULL);
 	result = -ENOMEM;
 	iw = kzalloc(sizeof(*iw), gfp_flags);
 	if (iw == NULL)