sim: Fix cc -Werror=shadow=local in cr16/simops.c

sim: Fix cc -Werror=shadow=local in cr16/simops.c

include/opcode/cr16.h defines cc as an enum value, which causes GCC 14
to warn

sim/cr16/simops.c: In function ‘cond_stat’:
sim/cr16/simops.c:138:26: error: declaration of ‘cc’ shadows a previous local [-Werror=shadow=local]
  138 | static int cond_stat(int cc)
      |                      ~~~~^~
In file included from ../../binutils-gdb/sim/cr16/cr16-sim.h:26,
                 from ../../binutils-gdb/sim/cr16/simops.c:39:
sim/../include/opcode/cr16.h:149:3: note: shadowed declaration is here
  149 |   cc,
      |   ^~

Fix this by renaming cc in cr16/simops.c to cond.