dma-debug/x86: register pci bus for dma-debug leak detection

Impact: detect dma memory leaks for pci devices

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index ebf7d45..c7c4776 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -271,6 +271,10 @@
 {
 	dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES);
 
+#ifdef CONFIG_PCI
+	dma_debug_add_bus(&pci_bus_type);
+#endif
+
 	calgary_iommu_init();
 
 	intel_iommu_init();