RDMA/iw_cxgb4: allocate enough space for debugfs "qps" dump

With IPv6 addresses, the "qps" debugfs is running out of space and
truncating the output. Bump the required size accordingly.

Signed-off-by: Steve Wise <[e-mail]>
Signed-off-by: Hariprasad Shenai <[e-mail]>
Signed-off-by: Doug Ledford <[e-mail]>

drivers/infiniband/hw/cxgb4/device.c

···
 	idr_for_each(&qpd->devp->qpidr, count_idrs, &count);
 	spin_unlock_irq(&qpd->devp->lock);
 
-	qpd->bufsize = count * 128;
+	qpd->bufsize = count * 180;
 	qpd->buf = vmalloc(qpd->bufsize);
 	if (!qpd->buf) {
 		kfree(qpd);