powerpc: Fix declaration type for I/O functions

Prototype declaration of I/O operation functions are not correct. as both
'extern' and function definition are at same place.

Chage protoype declaration as static.
Signed-off-by: NPrabhakar Kushwaha <prabhakar@freescale.com>

arch/powerpc/include/asm/io.h

@@ -162,7 +162,7 @@ static inline void __raw_writel(unsigned int v, volatile void __iomem *addr)
  * is actually performed (i.e. the data has come back) before we start
  * executing any following instructions.
  */
-extern inline u8 in_8(const volatile unsigned char __iomem *addr)
+static inline u8 in_8(const volatile unsigned char __iomem *addr)
 {
 	u8 ret;
 
@@ -173,7 +173,7 @@ extern inline u8 in_8(const volatile unsigned char __iomem *addr)
 	return ret;
 }
 
-extern inline void out_8(volatile unsigned char __iomem *addr, u8 val)
+static inline void out_8(volatile unsigned char __iomem *addr, u8 val)
 {
 	__asm__ __volatile__("sync;\n"
 			     "stb%U0%X0 %1,%0;\n"
@@ -181,7 +181,7 @@ extern inline void out_8(volatile unsigned char __iomem *addr, u8 val)
 			     : "r" (val));
 }
 
-extern inline u16 in_le16(const volatile unsigned short __iomem *addr)
+static inline u16 in_le16(const volatile unsigned short __iomem *addr)
 {
 	u16 ret;
 
@@ -192,7 +192,7 @@ extern inline u16 in_le16(const volatile unsigned short __iomem *addr)
 	return ret;
 }
 
-extern inline u16 in_be16(const volatile unsigned short __iomem *addr)
+static inline u16 in_be16(const volatile unsigned short __iomem *addr)
 {
 	u16 ret;
 
@@ -202,18 +202,18 @@ extern inline u16 in_be16(const volatile unsigned short __iomem *addr)
 	return ret;
 }
 
-extern inline void out_le16(volatile unsigned short __iomem *addr, u16 val)
+static inline void out_le16(volatile unsigned short __iomem *addr, u16 val)
 {
 	__asm__ __volatile__("sync; sthbrx %1,0,%2" : "=m" (*addr) :
 			      "r" (val), "r" (addr));
 }
 
-extern inline void out_be16(volatile unsigned short __iomem *addr, u16 val)
+static inline void out_be16(volatile unsigned short __iomem *addr, u16 val)
 {
 	__asm__ __volatile__("sync; sth%U0%X0 %1,%0" : "=m" (*addr) : "r" (val));
 }
 
-extern inline u32 in_le32(const volatile unsigned __iomem *addr)
+static inline u32 in_le32(const volatile unsigned __iomem *addr)
 {
 	u32 ret;
 
@@ -224,7 +224,7 @@ extern inline u32 in_le32(const volatile unsigned __iomem *addr)
 	return ret;
 }
 
-extern inline u32 in_be32(const volatile unsigned __iomem *addr)
+static inline u32 in_be32(const volatile unsigned __iomem *addr)
 {
 	u32 ret;
 
@@ -234,13 +234,13 @@ extern inline u32 in_be32(const volatile unsigned __iomem *addr)
 	return ret;
 }
 
-extern inline void out_le32(volatile unsigned __iomem *addr, u32 val)
+static inline void out_le32(volatile unsigned __iomem *addr, u32 val)
 {
 	__asm__ __volatile__("sync; stwbrx %1,0,%2" : "=m" (*addr) :
 			     "r" (val), "r" (addr));
 }
 
-extern inline void out_be32(volatile unsigned __iomem *addr, u32 val)
+static inline void out_be32(volatile unsigned __iomem *addr, u32 val)
 {
 	__asm__ __volatile__("sync; stw%U0%X0 %1,%0" : "=m" (*addr) : "r" (val));
 }