ARM: bcmring: use proper MMIO accessors

A lot of code in bcmring just dereferences pointers to MMIO
locations, which is not safe. This annotates the pointers
correctly using __iomem and uses readl/write to access them.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/arch/arm/mach-bcmring/mm.c b/arch/arm/mach-bcmring/mm.c
index 1adec78e..33824a8 100644
--- a/arch/arm/mach-bcmring/mm.c
+++ b/arch/arm/mach-bcmring/mm.c
@@ -20,12 +20,12 @@
 #include <mach/hardware.h>
 #include <mach/csp/mm_io.h>
 
-#define IO_DESC(va, sz) { .virtual = va, \
+#define IO_DESC(va, sz) { .virtual = (unsigned long)va, \
 	.pfn = __phys_to_pfn(HW_IO_VIRT_TO_PHYS(va)), \
 	.length = sz, \
 	.type = MT_DEVICE }
 
-#define MEM_DESC(va, sz) { .virtual = va, \
+#define MEM_DESC(va, sz) { .virtual = (unsigned long)va, \
 	.pfn = __phys_to_pfn(HW_IO_VIRT_TO_PHYS(va)), \
 	.length = sz, \
 	.type = MT_MEMORY }