target-sh4: make cpu-qom.h not target specific

Make SuperHCPU an opaque type within cpu-qom.h, and move all definitions
of private methods, as well as all type definitions that require knowledge
of the layout to cpu.h.  This helps making files independent of NEED_CPU_H
if they only need to pass around CPU pointers.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/target-sh4/cpu-qom.h b/target-sh4/cpu-qom.h
index 6341238..01abb20 100644
--- a/target-sh4/cpu-qom.h
+++ b/target-sh4/cpu-qom.h
@@ -60,35 +60,6 @@
     uint32_t cvr;
 } SuperHCPUClass;
 
-/**
- * SuperHCPU:
- * @env: #CPUSH4State
- *
- * A SuperH CPU.
- */
-typedef struct SuperHCPU {
-    /*< private >*/
-    CPUState parent_obj;
-    /*< public >*/
-
-    CPUSH4State env;
-} SuperHCPU;
-
-static inline SuperHCPU *sh_env_get_cpu(CPUSH4State *env)
-{
-    return container_of(env, SuperHCPU, env);
-}
-
-#define ENV_GET_CPU(e) CPU(sh_env_get_cpu(e))
-
-#define ENV_OFFSET offsetof(SuperHCPU, env)
-
-void superh_cpu_do_interrupt(CPUState *cpu);
-bool superh_cpu_exec_interrupt(CPUState *cpu, int int_req);
-void superh_cpu_dump_state(CPUState *cpu, FILE *f,
-                           fprintf_function cpu_fprintf, int flags);
-hwaddr superh_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
-int superh_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
-int superh_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
+typedef struct SuperHCPU SuperHCPU;
 
 #endif