[ARM] Convert asm/io.h to linux/io.h

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/kernel/dma-isa.c b/arch/arm/kernel/dma-isa.c
index 2f080a3..4a3a504 100644
--- a/arch/arm/kernel/dma-isa.c
+++ b/arch/arm/kernel/dma-isa.c
@@ -19,10 +19,9 @@
 #include <linux/ioport.h>
 #include <linux/init.h>
 #include <linux/dma-mapping.h>
+#include <linux/io.h>
 
 #include <asm/dma.h>
-#include <asm/io.h>
-
 #include <asm/mach/dma.h>
 
 #define ISA_DMA_MODE_READ	0x44