target-sparc: Typedef struct CPUSPARCState early

Will be needed for qemu_irq_ack callback.
Signed-off-by: NAndreas Färber <afaerber@suse.de>
Reviewed-by: NAnthony Liguori <aliguori@us.ibm.com>

target-sparc/cpu.h

@@ -378,7 +378,9 @@ struct QEMUFile;
 void cpu_put_timer(struct QEMUFile *f, CPUTimer *s);
 void cpu_get_timer(struct QEMUFile *f, CPUTimer *s);
 
-typedef struct CPUSPARCState {
+typedef struct CPUSPARCState CPUSPARCState;
+
+struct CPUSPARCState {
     target_ulong gregs[8]; /* general registers */
     target_ulong *regwptr; /* pointer to current register window */
     target_ulong pc;       /* program counter */
@@ -503,7 +505,7 @@ typedef struct CPUSPARCState {
 
     /* Leon3 cache control */
     uint32_t cache_control;
-} CPUSPARCState;
+};
 
 #ifndef NO_CPU_IO_DEFS
 /* cpu_init.c */