tcg: Widen tcg_gen_code pc_start argument to uint64_t

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
diff --git a/tcg/tcg.c b/tcg/tcg.c
index 48853e0..45e8aa6 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -5949,7 +5949,7 @@
 #endif
 
 
-int tcg_gen_code(TCGContext *s, TranslationBlock *tb, target_ulong pc_start)
+int tcg_gen_code(TCGContext *s, TranslationBlock *tb, uint64_t pc_start)
 {
 #ifdef CONFIG_PROFILER
     TCGProfile *prof = &s->prof;