target-lm32/microblaze: Drop second CPU{LM32, MB}State typedef

Commit 9b9a970a23625de4ae6b7461906a9a0d98d3ca95
(target-lm32/microblaze: Typedef struct CPU{MB,LM32}State)
introduced necessary typedefs for cpu_mmu_index() and mmu.h
respectively.

On some GCC versions this leads to "error: redefinition of typedef".

Drop the original typedef to hopefully fix the build.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/target-microblaze/cpu.h b/target-microblaze/cpu.h
index 3b52421..33b23c2 100644
--- a/target-microblaze/cpu.h
+++ b/target-microblaze/cpu.h
@@ -230,7 +230,7 @@
 #define STREAM_CONTROL   (1 << 3)
 #define STREAM_NONBLOCK  (1 << 4)
 
-typedef struct CPUMBState {
+struct CPUMBState {
     uint32_t debug;
     uint32_t btaken;
     uint32_t btarget;
@@ -264,7 +264,7 @@
 #endif
 
     CPU_COMMON
-} CPUMBState;
+};
 
 CPUMBState *cpu_mb_init(const char *cpu_model);
 int cpu_mb_exec(CPUMBState *s);