include: misc.h: unexport various bit/byte counting inline functions

Those aren't used by any external drivers, so no need to keep
them in public header.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>

test/input.c

@@ -40,6 +40,7 @@
 #include "dix/inpututils_priv.h"
 #include "mi/mi_priv.h"
 #include "os/fmt.h"
+#include "os/osdep.h"
 
 #include "misc.h"
 #include "resource.h"