Add definitions for NBBY to arm and rtems targets

* libc/sys/arm/sys/param.h (NBBY): Define if not already defined.
	* libc/sys/rtems/include/sys/param.h (NBBY): Define.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

newlib/libc/sys/arm/sys/param.h

@@ -6,6 +6,9 @@
 #include <machine/param.h>
 #include <machine/endian.h>
 
+#ifndef NBBY
+# define NBBY 8		/* number of bits in a byte */
+#endif
 #ifndef HZ
 # define HZ (60)
 #endif

newlib/libc/sys/rtems/include/sys/param.h

@@ -109,6 +109,7 @@
 
 #define	NZERO	0		/* default "nice" */
 
+#define	NBBY	8		/* number of bits in a byte */
 #define	NBPW	sizeof(int)	/* number of bytes per word (integer) */
 
 #define	CMASK	022		/* default file mask: S_IWGRP|S_IWOTH */