IB/usnic: Convert to use new iommu_capable() API function

Cc: Upinder Malhi <umalhi@cisco.com>
Signed-off-by: NJoerg Roedel <jroedel@suse.de>

drivers/infiniband/hw/usnic/usnic_uiom.c

@@ -507,7 +507,7 @@ int usnic_uiom_attach_dev_to_pd(struct usnic_uiom_pd *pd, struct device *dev)
 	if (err)
 		goto out_free_dev;
 
-	if (!iommu_domain_has_cap(pd->domain, IOMMU_CAP_CACHE_COHERENCY)) {
+	if (!iommu_capable(dev->bus, IOMMU_CAP_CACHE_COHERENCY)) {
 		usnic_err("IOMMU of %s does not support cache coherency\n",
 				dev_name(dev));
 		err = -EINVAL;