inifiband: Remove BKL from ipath_open()

cycle_kernel_lock() got pushed down to ipath_open(). I tried hard to
understand what it might protect, but finally gave up.

Roland noted that qlogic seems to have abandoned the ipath driver and
came to the following wise conclusion: "So I guess if the BKL stuff is
blocking you in any way, we can just drop it from ipath and leave it
as yet another race condition in a rotting old driver."
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
LKML-Reference: <adad44tj090.fsf@cisco.com>
Cc: Roland Dreier <rdreier@cisco.com>

drivers/infiniband/hw/ipath/ipath_file_ops.c

@@ -1821,7 +1821,6 @@ done:
 static int ipath_open(struct inode *in, struct file *fp)
 {
 	/* The real work is performed later in ipath_assign_port() */
-	cycle_kernel_lock();
 	fp->private_data = kzalloc(sizeof(struct ipath_filedata), GFP_KERNEL);
 	return fp->private_data ? 0 : -ENOMEM;
 }