11630 remove checks for 64-bit capable hardware

@@ -19,10 +19,11 @@
 # CDDL HEADER END
 #
 #
 # Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
 # Use is subject to license terms.
+# Copyright 2019 Peter Tribble.
 #
 # psm/stand/boot/sparcv9/ieee1275/sun4u/Makefile
 #
 #
 TOPDIR =        ../../../../../../..

@@ -54,11 +55,10 @@
         prom_map.c              \
         prom_mem.c              \
         prom_mmu.c              \
         prom_retain.c           \
         prom_sparc.c            \
-        prom_vercheck.c         \
         prom_vername.c
 
 KARCH =         sun4u
 MMU =           sfmmu