tools/nolibc/types: move makedev to types.h and make it a macro

The makedev() man page says it's supposed to be a macro and that some
OSes have it with the other ones in sys/types.h so it now makes sense
to move it to types.h as a macro. Let's also define major() and
minor() that perform the reverse operation.

Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

tools/include/nolibc/nolibc.h

@@ -116,13 +116,4 @@ const char *ltoa(long in)
 	return pos + 1;
 }
 
-/* Here come a few helper functions */
-
-/* WARNING, it only deals with the 4096 first majors and 256 first minors */
-static __attribute__((unused))
-dev_t makedev(unsigned int major, unsigned int minor)
-{
-	return ((major & 0xfff) << 8) | (minor & 0xff);
-}
-
 #endif /* _NOLIBC_H */