target/openrisc: Use env_cpu, env_archcpu

Cleanup in the boilerplate that each target must define.
Replace openrisc_env_get_cpu with env_archcpu.  The combination
CPU(openrisc_env_get_cpu) should have used ENV_GET_CPU to begin;
use env_cpu now.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

linux-user/openrisc/cpu_loop.c

@@ -23,7 +23,7 @@
 
 void cpu_loop(CPUOpenRISCState *env)
 {
-    CPUState *cs = CPU(openrisc_env_get_cpu(env));
+    CPUState *cs = env_cpu(env);
     int trapnr;
     abi_long ret;
     target_siginfo_t info;

target/openrisc/cpu.h

@@ -317,11 +317,6 @@ typedef struct OpenRISCCPU {
 
 } OpenRISCCPU;
 
-static inline OpenRISCCPU *openrisc_env_get_cpu(CPUOpenRISCState *env)
-{
-    return container_of(env, OpenRISCCPU, env);
-}
-
 #define ENV_OFFSET offsetof(OpenRISCCPU, env)
 
 void cpu_openrisc_list(void);

target/openrisc/exception_helper.c

@@ -25,15 +25,14 @@
 
 void HELPER(exception)(CPUOpenRISCState *env, uint32_t excp)
 {
-    OpenRISCCPU *cpu = openrisc_env_get_cpu(env);
+    OpenRISCCPU *cpu = env_archcpu(env);
 
     raise_exception(cpu, excp);
 }
 
 static void QEMU_NORETURN do_range(CPUOpenRISCState *env, uintptr_t pc)
 {
-    OpenRISCCPU *cpu = openrisc_env_get_cpu(env);
-    CPUState *cs = CPU(cpu);
+    CPUState *cs = env_cpu(env);
 
     cs->exception_index = EXCP_RANGE;
     cpu_loop_exit_restore(cs, pc);

target/openrisc/sys_helper.c

@@ -30,8 +30,8 @@
 void HELPER(mtspr)(CPUOpenRISCState *env, target_ulong spr, target_ulong rb)
 {
 #ifndef CONFIG_USER_ONLY
-    OpenRISCCPU *cpu = openrisc_env_get_cpu(env);
-    CPUState *cs = CPU(cpu);
+    OpenRISCCPU *cpu = env_archcpu(env);
+    CPUState *cs = env_cpu(env);
     target_ulong mr;
     int idx;
 
@@ -194,8 +194,8 @@ target_ulong HELPER(mfspr)(CPUOpenRISCState *env, target_ulong rd,
                            target_ulong spr)
 {
 #ifndef CONFIG_USER_ONLY
-    OpenRISCCPU *cpu = openrisc_env_get_cpu(env);
-    CPUState *cs = CPU(cpu);
+    OpenRISCCPU *cpu = env_archcpu(env);
+    CPUState *cs = env_cpu(env);
     int idx;
 
     switch (spr) {