iommu/amd: Don't use dev_data in irte_ga_set_affinity()

search_dev_data() acquires a non-raw lock, which can't be done
from atomic context on PREEMPT_RT.  There is no need to look at
dev_data because guest_mode should never be set if use_vapic is
not set.
Signed-off-by: Scott Wood <swood@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/amd_iommu.c

@@ -3877,10 +3877,8 @@ static void irte_ga_set_affinity(void *entry, u16 devid, u16 index,
 				 u8 vector, u32 dest_apicid)
 {
 	struct irte_ga *irte = (struct irte_ga *) entry;
-	struct iommu_dev_data *dev_data = search_dev_data(devid);
 
-	if (!dev_data || !dev_data->use_vapic ||
-	    !irte->lo.fields_remap.guest_mode) {
+	if (!irte->lo.fields_remap.guest_mode) {
 		irte->hi.fields.vector = vector;
 		irte->lo.fields_remap.destination = dest_apicid;
 		modify_irte_ga(devid, index, irte, NULL);