S390: Guard RISBG usage with facility check

src/crankshaft/s390/lithium-codegen-s390.cc

Index: src/crankshaft/s390/lithium-codegen-s390.cc
diff --git a/src/crankshaft/s390/lithium-codegen-s390.cc b/src/crankshaft/s390/lithium-codegen-s390.cc
index e9fc3118c52b0c879744e428e9aad972cf42fa92..b7c112bb84afc65523e2c5343e26a5b44feb7a82 100644
--- a/src/crankshaft/s390/lithium-codegen-s390.cc
+++ b/src/crankshaft/s390/lithium-codegen-s390.cc
@@ -4229,7 +4229,8 @@ void LCodeGen::DoStoreKeyedFixedArray(LStoreKeyed* instr) {
     if (hinstr->key()->representation().IsSmi()) {
       __ SmiToPtrArrayOffset(scratch, key);
     } else {
-      if (instr->hydrogen()->IsDehoisted()) {
+      if (instr->hydrogen()->IsDehoisted() ||
+          !CpuFeatures::IsSupported(GENERAL_INSTR_EXT)) {
 #if V8_TARGET_ARCH_S390X
         // If array access is dehoisted, the key, being an int32, can contain
         // a negative value, as needs to be sign-extended to 64-bit for