iommu/vt-d: Add build dependency on IOASID

IOASID code is needed by VT-d scalable mode for PASID allocation.
Add explicit dependency such that IOASID is built-in whenever Intel
IOMMU is enabled.
Otherwise, aux domain code will fail when IOMMU is built-in and IOASID
is compiled as a module.

Fixes: 59a6233 ("iommu/vt-d: Replace Intel specific PASID allocator with IOASID")
Signed-off-by: Jacob Pan <[email protected]>
Acked-by: Lu Baolu <[email protected]>
Signed-off-by: Joerg Roedel <[email protected]>

Author: Jacob Pan

drivers/iommu/Kconfig

@@ -188,6 +188,7 @@ config INTEL_IOMMU
 	select NEED_DMA_MAP_STATE
 	select DMAR_TABLE
 	select SWIOTLB
+	select IOASID
 	help
 	  DMA remapping (DMAR) devices support enables independent address
 	  translations for Direct Memory Access (DMA) from devices.