Rename cpu_reset() to cpu_state_reset()

Frees the identifier cpu_reset for QOM CPUs (manual rename).

Don't hide the parameter type behind explicit casts, use static
functions with strongly typed argument to indirect.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>

hw/lm32_boards.c

@@ -56,7 +56,7 @@ static void main_cpu_reset(void *opaque)
     ResetInfo *reset_info = opaque;
     CPUState *env = reset_info->env;
 
-    cpu_reset(env);
+    cpu_state_reset(env);
 
     /* init defaults */
     env->pc = (uint32_t)reset_info->bootstrap_pc;