move bswap functions to static inline in byteswap.h

include/byteswap.h

+#ifndef _BYTESWAP_H
+#define _BYTESWAP_H
+
+#include <stdint.h>
+
+static inline uint16_t __bswap_16(uint16_t __x)
+{
+	return __x<<8 | __x>>8;
+}
+
+static inline uint32_t __bswap_32(uint32_t __x)
+{
+	return __x>>24 | __x>>8&0xff00 | __x<<8&0xff0000 | __x<<24;
+}
+
+static inline uint64_t __bswap_64(uint64_t __x)
+{
+	return __bswap_32(__x)+0ULL<<32 | __bswap_32(__x>>32);
+}
+
+#define bswap_16(x) __bswap_16(x)
+#define bswap_32(x) __bswap_32(x)
+#define bswap_64(x) __bswap_64(x)
+
+#endif

src/misc/bswap_32.c

-#include <endian.h>
-#include <stdint.h>
-
-uint32_t bswap_32(uint32_t x)
-{
-	return x>>24 | x>>8&0xff00 | x<<8&0xff0000 | x<<24;
-}

src/misc/bswap_64.c

-#include <endian.h>
-#include <stdint.h>
-
-uint32_t bswap_32(uint32_t);
-
-uint64_t bswap_64(uint64_t x)
-{
-	return bswap_32(x)+0LL<<32 | bswap_32(x>>32);
-}