iommu/amd: Initialize amd_iommu_last_bdf for DEV_ALL

Also initialize the amd_iommu_last_bdf variable when a
IVHD_DEV_ALL entry is found in the ACPI table.
Signed-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/amd_iommu_init.c

@@ -441,6 +441,10 @@ static int __init find_last_devid_from_ivhd(struct ivhd_header *h)
 	while (p < end) {
 		dev = (struct ivhd_entry *)p;
 		switch (dev->type) {
+		case IVHD_DEV_ALL:
+			/* Use maximum BDF value for DEV_ALL */
+			update_last_devid(0xffff);
+			break;
 		case IVHD_DEV_SELECT:
 		case IVHD_DEV_RANGE_END:
 		case IVHD_DEV_ALIAS: