Remove generic "am29k" (now you have to specify a29k-xxx-yyy).

Add ultra3 as a29k-nyu-sym1 (host and target).

config.sub

@@ -11,7 +11,7 @@
 # Each package is responsible for reporting which valid configurations
 # it does not support.  The user should be able to distinguish
 # a failure to support a valid configuration from a meaningless
-# configuration.
+# configuration (e.g. a typo).
 
 # Please email any bugs, comments, and/or additions to this file to:
 # configure@cygnus.com
@@ -37,11 +37,6 @@ altosgas)
 	vendor=altos
 	os=gas
 	;;
-am29k)
-	cpu=a29k
-	vendor=none
-	os=bsd
-	;;
 amdahl)
 	cpu=580
 	vendor=amdahl
@@ -307,6 +302,11 @@ tower | tower-32)
 	vendor=ncr
 	os=sysv # maybe?
 	;;
+ultra3)
+	cpu=a29k
+	vendor=nyu
+	os=sym1
+	;;
 umax)
 	cpu=ns32k
 	vendor=encore