AMD IOMMU: convert iommu->need_sync to bool

Impact: use bool instead of int for iommu->need_sync
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

arch/x86/include/asm/amd_iommu_types.h

@@ -302,7 +302,7 @@ struct amd_iommu {
 	bool int_enabled;
 
 	/* if one, we need to send a completion wait command */
-	int need_sync;
+	bool need_sync;
 
 	/* default dma_ops domain for that IOMMU */
 	struct dma_ops_domain *default_dom;

arch/x86/kernel/amd_iommu.c

@@ -198,7 +198,7 @@ static int iommu_queue_command(struct amd_iommu *iommu, struct iommu_cmd *cmd)
 	spin_lock_irqsave(&iommu->lock, flags);
 	ret = __iommu_queue_command(iommu, cmd);
 	if (!ret)
-		iommu->need_sync = 1;
+		iommu->need_sync = true;
 	spin_unlock_irqrestore(&iommu->lock, flags);
 
 	return ret;
@@ -263,7 +263,7 @@ static int iommu_completion_wait(struct amd_iommu *iommu)
 
 	ret = __iommu_completion_wait(iommu);
 
-	iommu->need_sync = 0;
+	iommu->need_sync = false;
 
 	if (ret)
 		goto out;