Rework ioremap() for PPC and ARM. The PPC devices require a
non-coherent mapping while ARM will work with a non-cachable/write
combine mapping.

Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
---
 drivers/soc/fsl/qbman/bman_portal.c | 16 +++++++++++++---
 drivers/soc/fsl/qbman/qman_portal.c | 16 +++++++++++++---
 2 files changed, 26 insertions(+), 6 deletions(-)

diff --git a/drivers/soc/fsl/qbman/bman_portal.c

b/drivers/soc/fsl/qbman/bman_portal.c
index 8354d4d..a661f30 100644

--- a/drivers/soc/fsl/qbman/bman_portal.c
+++ b/drivers/soc/fsl/qbman/bman_portal.c

@@ -125,7 +125,18 @@ static int bman_portal_probe(struct platform_device

*pdev)
 	}
 	pcfg->irq = irq;
 
-	va = ioremap_prot(addr_phys[0]->start, resource_size(addr_phys[0]),
0);
+#ifdef CONFIG_PPC
+	/* PPC requires a cacheable/non-coherent mapping of the portal */
+	va = ioremap_prot(addr_phys[0]->start, resource_size(addr_phys[0]),
+			  (pgprot_val(PAGE_KERNEL) & ~_PAGE_COHERENT));
+#else
+	/*
+	 * For ARM we can use write combine mapping.  A cacheable/non
shareable
+	 * mapping will perform better but equires additional platform
+	 * support which is not currently available
+	 */