IB/ipath: Remove reference to dev->class_dev

                                                                                                    
Commit 124b4dc ("IB/ipath: add calls to new 7220 code and enable in                                
build") inadvertently added core to set dev->class_dev.dev back into                                
ib_ipath.  This is completely redundant since commit 1912ffb ("IB: Set                             
class_dev->dev in core for nice device symlink"), which removed                                     
class_dev setting from low-level drivers, and also will break the build
when class_dev is removed completely from struct ib_device.

Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/hw/ipath/ipath_verbs.c

@@ -2067,7 +2067,6 @@ int ipath_register_ib_device(struct ipath_devdata *dd)
 	dev->phys_port_cnt = 1;
 	dev->num_comp_vectors = 1;
 	dev->dma_device = &dd->pcidev->dev;
-	dev->class_dev.dev = dev->dma_device;
 	dev->query_device = ipath_query_device;
 	dev->modify_device = ipath_modify_device;
 	dev->query_port = ipath_query_port;