11630 remove checks for 64-bit capable hardware

*** 53,60 ****
          prom_serengeti.o                \
          prom_set_traptable.o            \
          prom_sparc.o                    \
          prom_sunfire.o                  \
          prom_tlb.o                      \
-         prom_vercheck.o                 \
          prom_vername.o                  \
          prom_opl.o
--- 53,59 ----