Move sys/iommu.h to dev/iommu/ as a part of generic IOMMU busdma backend.

Reviewed by:	kib
Sponsored by:	DARPA/AFRL
Differential Revision:	https://reviews.freebsd.org/D25750

sys/dev/iommu/busdma_iommu.c

@@ -39,7 +39,6 @@ __FBSDID("$FreeBSD$");
 #include <sys/bus.h>
 #include <sys/conf.h>
 #include <sys/interrupt.h>
-#include <sys/iommu.h>
 #include <sys/kernel.h>
 #include <sys/ktr.h>
 #include <sys/lock.h>
@@ -68,6 +67,7 @@ __FBSDID("$FreeBSD$");
 #include <x86/include/busdma_impl.h>
 #include <x86/iommu/intel_reg.h>
 #include <dev/iommu/busdma_iommu.h>
+#include <dev/iommu/iommu.h>
 #include <x86/iommu/intel_dmar.h>
 #endif
 

sys/dev/iommu/busdma_iommu.h

@@ -34,7 +34,7 @@
 #ifndef __X86_IOMMU_BUSDMA_DMAR_H
 #define __X86_IOMMU_BUSDMA_DMAR_H
 
-#include <sys/iommu.h>
+#include <dev/iommu/iommu.h>
 
 struct bus_dma_tag_iommu {
 	struct bus_dma_tag_common common;

sys/x86/iommu/intel_dmar.h

@@ -34,7 +34,7 @@
 #ifndef __X86_IOMMU_INTEL_DMAR_H
 #define	__X86_IOMMU_INTEL_DMAR_H
 
-#include <sys/iommu.h>
+#include <dev/iommu/iommu.h>
 
 struct dmar_unit;