target-sparc: Add npc state to insn_start

Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>

target-sparc/cpu.h

@@ -230,6 +230,7 @@ typedef struct trap_state {
     uint32_t tt;
 } trap_state;
 #endif
+#define TARGET_INSN_START_EXTRA_WORDS 1
 
 typedef struct sparc_def_t {
     const char *name;