target: Use CPUArchState as interface to target-specific CPU state

While CPUState is our interface with generic code, CPUArchState is
our interface with target-specific code. Use CPUArchState as an
abstract type, defined by each target.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220214183144.27402-13-f4bug@amsat.org>
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index 24d9fff..fe55ca8 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -232,7 +232,7 @@
     target_ulong flags2;
 } CPUARMTBFlags;
 
-typedef struct CPUARMState {
+typedef struct CPUArchState {
     /* Regs for current mode.  */
     uint32_t regs[16];
 
@@ -3410,7 +3410,6 @@
     }
 }
 
-typedef CPUARMState CPUArchState;
 typedef ARMCPU ArchCPU;
 
 #include "exec/cpu-all.h"