accel/tcg: Remove cpu_set_cpustate_pointers

This function is now empty, so remove it.  In the case of
m68k and tricore, this empties the class instance initfn,
so remove those as well.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

target/microblaze/cpu.c

@@ -296,7 +296,6 @@ static void mb_cpu_initfn(Object *obj)
     MicroBlazeCPU *cpu = MICROBLAZE_CPU(obj);
     CPUMBState *env = &cpu->env;
 
-    cpu_set_cpustate_pointers(cpu);
     gdb_register_coprocessor(CPU(cpu), mb_cpu_gdb_read_stack_protect,
                              mb_cpu_gdb_write_stack_protect, 2,
                              "microblaze-stack-protect.xml", 0);