Add /dev/random hooks to the key input routines for pcvt. This allows

the scancodes on a PCVT machine to be used as stochastic input as well
as SysCons..
Reviewed by:	Joerg Wunsch

sys/i386/isa/pcvt/pcvt_hdr.h

@@ -81,7 +81,9 @@
 #include <sys/syslog.h>
 #include <sys/malloc.h>
 #include <sys/time.h>
-
+#if PCVT_FREEBSD > 210
+#include <machine/random.h>
+#endif	/* PCVT_FREEBSD > 210 */
 #else /* ! PCVT_FREEBSD >= 200 */
 
 #include "param.h"

sys/i386/isa/pcvt/pcvt_kbd.c

@@ -981,6 +981,11 @@ loop:
 		if (pcvt_kbd_raw)
 		{
 			keybuf[0] = dt;
+
+#if PCVT_FREEBSD > 210
+			add_keyboard_randomness(dt);
+#endif	/* PCVT_FREEBSD > 210 */
+
 #if !PCVT_USL_VT_COMPAT
 			if ((dt & 0x80) == 0)
 				/* key make */
@@ -1323,6 +1328,10 @@ no_mouse_event:
 	/* got a normal scan key */
 regular:
 
+#if PCVT_FREEBSD > 210
+	add_keyboard_randomness(dt);
+#endif	/* PCVT_FREEBSD > 210 */
+
 #if PCVT_SCANSET == 1
 	kbd_status.breakseen = dt & 0x80 ? 1 : 0;
 	dt &= 0x7f;