add MID_MACHINE #defined to be MID_HP300

sys/arch/hp300/include/param.h

@@ -38,13 +38,14 @@
  * from: Utah $Hdr: machparam.h 1.11 89/08/14$
  *
  *	from: @(#)param.h	7.8 (Berkeley) 6/28/91
- *	$Id: param.h,v 1.2 1993/05/22 07:58:25 cgd Exp $
+ *	$Id: param.h,v 1.3 1993/07/04 02:27:30 cgd Exp $
  */
 
 /*
  * Machine dependent constants for HP9000 series 300.
  */
 #define	MACHINE "hp300"
+#define MID_MACHINE	MID_HP300
 
 /*
  * Round p (pointer or byte index) up to a correctly-aligned value