staging: vc04_services: Delete unnecessary NULL check

The "state" pointer points to an offset in the middle of the "mgmt"
struct so it can't possibly be NULL.  And also we dereferenced it on the
line before.  So this NULL check is pointless.  Delete it.

Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Stefan Wahren <wahrenst@gmx.net>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Link: https://lore.kernel.org/r/526ec2ff-6277-4d5d-b2d9-63b087a97c7c@moroto.mountain
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vc04_services/interface/vchiq_arm/vchiq_dev.c

@@ -1170,11 +1170,6 @@ static int vchiq_open(struct inode *inode, struct file *file)
 
 	dev_dbg(state->dev, "arm: vchiq open\n");
 
-	if (!state) {
-		dev_err(state->dev, "arm: vchiq has no connection to VideoCore\n");
-		return -ENOTCONN;
-	}
-
 	instance = kzalloc(sizeof(*instance), GFP_KERNEL);
 	if (!instance)
 		return -ENOMEM;