soc/qbman: Move dma-mapping.h include to qman_priv.h

With the include there it fixes all build failures in this
directory caused by commit 461a6946.

Fixes: 461a6946 ("iommu: Remove pci.h include from trace/events/iommu.h")
Signed-off-by: Joerg Roedel <jroedel@suse.de>

drivers/soc/fsl/qbman/qman_portal.c

@@ -30,8 +30,6 @@
 
 #include "qman_priv.h"
 
-#include <linux/dma-mapping.h>
-
 struct qman_portal *qman_dma_portal;
 EXPORT_SYMBOL(qman_dma_portal);
 

drivers/soc/fsl/qbman/qman_priv.h

@@ -33,6 +33,7 @@
 #include "dpaa_sys.h"
 
 #include <soc/fsl/qman.h>
+#include <linux/dma-mapping.h>
 #include <linux/iommu.h>
 
 #if defined(CONFIG_FSL_PAMU)