Switch arm64 to use intrng by default. The old interrupt handling code can

still be used, however this is expected to be removed soon.

Obtained from:	ABT Systems Ltd
Relnotes:	yes
Sponsored by:	The FreeBSD Foundation

sys/arm64/conf/GENERIC

@@ -70,6 +70,7 @@ options 	RACCT			# Resource accounting framework
 options 	RACCT_DEFAULT_TO_DISABLED # Set kern.racct.enable=0 by default
 options 	RCTL			# Resource limits
 options 	SMP
+options 	INTRNG
 
 # Debugging support.  Always need this:
 options 	KDB			# Enable kernel debugger support.

sys/arm64/conf/GENERIC-INTRNG

@@ -1,15 +0,0 @@
-#
-# GENERIC-INTRNG -- intrng testing kernel for FreeBSD/arm64
-#
-# This config adds intrng support for testing, and to ensure intrng is not
-# broken before switching to it. The config is expected to be removed soon
-# when intrng becomes the default on arm64.
-#
-# $FreeBSD$
-#
-
-include	GENERIC
-
-ident	GENERIC-INTRNG
-
-options 	INTRNG