sim: or1k: fix iterator typo when setting up cpus

This code loops over available cpus with "c", but then looks up the
cpu with "i".  Fix the typo so the code works correctly with smp.

sim/or1k/sim-if.c

diff --git a/sim/or1k/sim-if.c b/sim/or1k/sim-if.c
index d698d70..799812b 100644
--- a/sim/or1k/sim-if.c
+++ b/sim/or1k/sim-if.c
@@ -244,7 +244,7 @@
   }
 
   /* Do some final OpenRISC sim specific initializations.  */
-  for (c = 0; c < MAX_NR_PROCESSORS; ++c)
+  for (i = 0; i < MAX_NR_PROCESSORS; ++i)
     {
       SIM_CPU *cpu = STATE_CPU (sd, i);
       /* Only needed for profiling, but the structure member is small.  */