target/ppc: Get CPUState in one step

We can get CPUState from env with env_cpu without going through
PowerPCCPU and casting that.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Acked-by: Nicholas Piggin <npiggin@gmail.com>
Message-ID: <28424220f37f51ce97f24cadc7538a9c0d16cb45.1686868895.git.balaton@eik.bme.hu>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>

target/ppc/excp_helper.c

@@ -1770,8 +1770,8 @@ static int p7_interrupt_powersave(CPUPPCState *env)
 
 static int p7_next_unmasked_interrupt(CPUPPCState *env)
 {
-    PowerPCCPU *cpu = env_archcpu(env);
-    CPUState *cs = CPU(cpu);
+    CPUState *cs = env_cpu(env);
+
     /* Ignore MSR[EE] when coming out of some power management states */
     bool msr_ee = FIELD_EX64(env->msr, MSR, EE) || env->resume_as_sreset;
 
@@ -1860,8 +1860,8 @@ static int p8_interrupt_powersave(CPUPPCState *env)
 
 static int p8_next_unmasked_interrupt(CPUPPCState *env)
 {
-    PowerPCCPU *cpu = env_archcpu(env);
-    CPUState *cs = CPU(cpu);
+    CPUState *cs = env_cpu(env);
+
     /* Ignore MSR[EE] when coming out of some power management states */
     bool msr_ee = FIELD_EX64(env->msr, MSR, EE) || env->resume_as_sreset;
 
@@ -1981,8 +1981,8 @@ static int p9_interrupt_powersave(CPUPPCState *env)
 
 static int p9_next_unmasked_interrupt(CPUPPCState *env)
 {
-    PowerPCCPU *cpu = env_archcpu(env);
-    CPUState *cs = CPU(cpu);
+    CPUState *cs = env_cpu(env);
+
     /* Ignore MSR[EE] when coming out of some power management states */
     bool msr_ee = FIELD_EX64(env->msr, MSR, EE) || env->resume_as_sreset;
 
@@ -2675,9 +2675,8 @@ void helper_scv(CPUPPCState *env, uint32_t lev)
 
 void helper_pminsn(CPUPPCState *env, uint32_t insn)
 {
-    CPUState *cs;
+    CPUState *cs = env_cpu(env);
 
-    cs = env_cpu(env);
     cs->halted = 1;
 
     /* Condition for waking up at 0x100 */