tcg: Fix MAX_OPC_PARAM_IARGS

DEF_HELPER_FLAGS_5 was added some time ago without adjusting
MAX_OPC_PARAM_IARGS.

Fixing the definition becomes more important as QEMU is using
an increasing number of helper functions called with 5 arguments.

Add also a comment to avoid future problems when DEF_HELPER_FLAGS_6
will be added.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

def-helper.h

diff --git a/def-helper.h b/def-helper.h
index b98ff69..022a9ce 100644
--- a/def-helper.h
+++ b/def-helper.h
@@ -128,6 +128,8 @@
 #define DEF_HELPER_5(name, ret, t1, t2, t3, t4, t5) \
     DEF_HELPER_FLAGS_5(name, 0, ret, t1, t2, t3, t4, t5)
 
+/* MAX_OPC_PARAM_IARGS must be set to n if last entry is DEF_HELPER_FLAGS_n. */
+
 #endif /* DEF_HELPER_H */
 
 #ifndef GEN_HELPER

exec-all.h

diff --git a/exec-all.h b/exec-all.h
index c5ec8e1..4f4fafc 100644
--- a/exec-all.h
+++ b/exec-all.h
@@ -51,7 +51,7 @@
 #else
 #define MAX_OPC_PARAM_PER_ARG 1
 #endif
-#define MAX_OPC_PARAM_IARGS 4
+#define MAX_OPC_PARAM_IARGS 5
 #define MAX_OPC_PARAM_OARGS 1
 #define MAX_OPC_PARAM_ARGS (MAX_OPC_PARAM_IARGS + MAX_OPC_PARAM_OARGS)