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>

cpu-exec.c

@@ -340,7 +340,7 @@ int cpu_exec(CPUState *env)
                     }
 #elif defined(TARGET_PPC)
                     if ((interrupt_request & CPU_INTERRUPT_RESET)) {
-                        cpu_reset(env);
+                        cpu_state_reset(env);
                     }
                     if (interrupt_request & CPU_INTERRUPT_HARD) {
                         ppc_hw_interrupt(env);