sun4m: move IOMMU declarations from sun4m.h to sun4m_iommu.h

Also updating the relevant .c files as required.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Acked-by: Artyom Tarasenko <atar4qemu@gmail.com>
diff --git a/hw/dma/sparc32_dma.c b/hw/dma/sparc32_dma.c
index 01afb75..c04ad79 100644
--- a/hw/dma/sparc32_dma.c
+++ b/hw/dma/sparc32_dma.c
@@ -29,6 +29,7 @@
 #include "hw/hw.h"
 #include "hw/sparc/sparc32_dma.h"
 #include "hw/sparc/sun4m.h"
+#include "hw/sparc/sun4m_iommu.h"
 #include "hw/sysbus.h"
 #include "sysemu/dma.h"
 #include "qapi/error.h"