tcg: Add tcg target default memory ordering

Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Message-Id: <20170829063313.10237-3-bobby.prani@gmail.com>
[rth: Dropped ia64 hunk]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
diff --git a/tcg/s390/tcg-target.h b/tcg/s390/tcg-target.h
index 957f0c0..dc0e591 100644
--- a/tcg/s390/tcg-target.h
+++ b/tcg/s390/tcg-target.h
@@ -133,6 +133,8 @@
 
 #define TCG_TARGET_EXTEND_ARGS 1
 
+#define TCG_TARGET_DEFAULT_MO (TCG_MO_ALL & ~TCG_MO_ST_LD)
+
 enum {
     TCG_AREG0 = TCG_REG_R10,
 };