m68k:correct io macros about endian

M68k is big endian cpu ,so use be_out and be_in in big endian.
Signed-off-by: NChao Fu <b44548@freescale.com>

arch/m68k/include/asm/io.h

@@ -32,10 +32,10 @@
 #define writew(b,addr)		((*(volatile u16 *) (addr)) = (b))
 #define writel(b,addr)		((*(volatile u32 *) (addr)) = (b))
 #else
-#define readw(addr)		in_le16((volatile u16 *)(addr))
-#define readl(addr)		in_le32((volatile u32 *)(addr))
-#define writew(b,addr)		out_le16((volatile u16 *)(addr),(b))
-#define writel(b,addr)		out_le32((volatile u32 *)(addr),(b))
+#define readw(addr)		in_be16((volatile u16 *)(addr))
+#define readl(addr)		in_be32((volatile u32 *)(addr))
+#define writew(b,addr)		out_be16((volatile u16 *)(addr),(b))
+#define writel(b,addr)		out_be32((volatile u32 *)(addr),(b))
 #endif
 
 /*