infiniband: cxgb4: use %pR format string for printing resources

The cxgb4 prints an MMIO resource using the "0x%x" and "%p" format
strings on the length and start, respective, but that
triggers a compiler warning when using a 64-bit resource_size_t
on a 32-bit architecture:

drivers/infiniband/hw/cxgb4/device.c: In function 'c4iw_rdev_open':
drivers/infiniband/hw/cxgb4/device.c:807:7: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
       (void *)pci_resource_start(rdev->lldi.pdev, 2),

This changes the format string to use %pR instead, which pretty-prints
the resource, avoids the warning and is shorter.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/cxgb4/device.c

@@ -801,10 +801,9 @@ static int c4iw_rdev_open(struct c4iw_rdev *rdev)
 	     rdev->lldi.vr->qp.size,
 	     rdev->lldi.vr->cq.start,
 	     rdev->lldi.vr->cq.size);
-	PDBG("udb len 0x%x udb base %p db_reg %p gts_reg %p "
+	PDBG("udb %pR db_reg %p gts_reg %p "
 	     "qpmask 0x%x cqmask 0x%x\n",
-	     (unsigned)pci_resource_len(rdev->lldi.pdev, 2),
-	     (void *)pci_resource_start(rdev->lldi.pdev, 2),
+		&rdev->lldi.pdev->resource[2],
 	     rdev->lldi.db_reg, rdev->lldi.gts_reg,
 	     rdev->qpmask, rdev->cqmask);