ppc: Fix build problem in ppc4xx_sgdma.c

ppc4xx_sgdma.c is #including asm/dma-mapping.h directly, which should
only ever be included via linux/dma-mapping.h.  asm/dma-mapping.h
relies on an enum defined in linux/dma-mapping.h before its own
include.  This fixes the problem.

Signed-off-by: David Gibson <redacted>

Index: working-2.6/arch/ppc/syslib/ppc4xx_sgdma.c
===================================================================

--- working-2.6.orig/arch/ppc/syslib/ppc4xx_sgdma.c	2007-05-07 12:04:40.000000000 +1000
+++ working-2.6/arch/ppc/syslib/ppc4xx_sgdma.c	2007-05-07 12:04:47.000000000 +1000

@@ -23,10 +23,10 @@
 #include <linux/mm.h>
 #include <linux/init.h>
 #include <linux/module.h>
+#include <linux/dma-mapping.h>
 
 #include <asm/system.h>
 #include <asm/io.h>
-#include <asm/dma-mapping.h>
 #include <asm/ppc4xx_dma.h>
 
 void

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson