Blackfin arch: cleanup IO and DMA_IO API function definitions according to other arches

Signed-off-by: Bryan Wu <bryan.wu@analog.com>

arch/blackfin/kernel/bfin_dma_5xx.c

@@ -583,7 +583,7 @@ void *safe_dma_memcpy(void *dest, const void *src, size_t size)
 }
 EXPORT_SYMBOL(safe_dma_memcpy);
 
-void dma_outsb(void __iomem *addr, const void *buf, unsigned short len)
+void dma_outsb(const void __iomem *addr, const void *buf, unsigned short len)
 {
 	unsigned long flags;
 
@@ -647,7 +647,7 @@ void dma_insb(const void __iomem *addr, void *buf, unsigned short len)
 }
 EXPORT_SYMBOL(dma_insb);
 
-void dma_outsw(void __iomem *addr, const void  *buf, unsigned short len)
+void dma_outsw(const void __iomem *addr, const void  *buf, unsigned short len)
 {
 	unsigned long flags;
 
@@ -711,7 +711,7 @@ void dma_insw(const void __iomem *addr, void *buf, unsigned short len)
 }
 EXPORT_SYMBOL(dma_insw);
 
-void dma_outsl(void __iomem *addr, const void *buf, unsigned short len)
+void dma_outsl(const void __iomem *addr, const void *buf, unsigned short len)
 {
 	unsigned long flags;
 

include/asm-blackfin/io.h

@@ -115,17 +115,17 @@ static inline unsigned int readl(const volatile void __iomem *addr)
 
 #ifndef __ASSEMBLY__
 
-extern void outsb(void __iomem *port, const void *addr, unsigned short count);
-extern void outsw(void __iomem *port, const void *addr, unsigned short count);
-extern void outsl(void __iomem *port, const void *addr, unsigned short count);
+extern void outsb(const void __iomem *port, const void *addr, unsigned short count);
+extern void outsw(const void __iomem *port, const void *addr, unsigned short count);
+extern void outsl(const void __iomem *port, const void *addr, unsigned short count);
 
 extern void insb(const void __iomem *port, void *addr, unsigned short count);
 extern void insw(const void __iomem *port, void *addr, unsigned short count);
 extern void insl(const void __iomem *port, void *addr, unsigned short count);
 
-extern void dma_outsb(void __iomem *port, const void *addr, unsigned short count);
-extern void dma_outsw(void __iomem *port, const void *addr, unsigned short count);
-extern void dma_outsl(void __iomem *port, const void *addr, unsigned short count);
+extern void dma_outsb(const void __iomem *port, const void *addr, unsigned short count);
+extern void dma_outsw(const void __iomem *port, const void *addr, unsigned short count);
+extern void dma_outsl(const void __iomem *port, const void *addr, unsigned short count);
 
 extern void dma_insb(const void __iomem *port, void *addr, unsigned short count);
 extern void dma_insw(const void __iomem *port, void *addr, unsigned short count);