hw/riscv/shakti_c: Check CPU type in machine_run_board_init()

Set mc->valid_cpu_types so that the user specified CPU type can
be validated in machine_run_board_init(). We needn't to do it
by ourselves.

Signed-off-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20231204004726.483558-10-gshan@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

hw/riscv/shakti_c.c

@@ -28,7 +28,6 @@
 #include "exec/address-spaces.h"
 #include "hw/riscv/boot.h"
 
-
 static const struct MemmapEntry {
     hwaddr base;
     hwaddr size;
@@ -47,12 +46,6 @@ static void shakti_c_machine_state_init(MachineState *mstate)
     ShaktiCMachineState *sms = RISCV_SHAKTI_MACHINE(mstate);
     MemoryRegion *system_memory = get_system_memory();
 
-    /* Allow only Shakti C CPU for this platform */
-    if (strcmp(mstate->cpu_type, TYPE_RISCV_CPU_SHAKTI_C) != 0) {
-        error_report("This board can only be used with Shakti C CPU");
-        exit(1);
-    }
-
     /* Initialize SoC */
     object_initialize_child(OBJECT(mstate), "soc", &sms->soc,
                             TYPE_RISCV_SHAKTI_SOC);
@@ -82,9 +75,15 @@ static void shakti_c_machine_instance_init(Object *obj)
 static void shakti_c_machine_class_init(ObjectClass *klass, void *data)
 {
     MachineClass *mc = MACHINE_CLASS(klass);
+    static const char * const valid_cpu_types[] = {
+        RISCV_CPU_TYPE_NAME("shakti-c"),
+        NULL
+    };
+
     mc->desc = "RISC-V Board compatible with Shakti SDK";
     mc->init = shakti_c_machine_state_init;
     mc->default_cpu_type = TYPE_RISCV_CPU_SHAKTI_C;
+    mc->valid_cpu_types = valid_cpu_types;
     mc->default_ram_id = "riscv.shakti.c.ram";
 }