target-s390x: avoid AREG0 for FPU helpers

Make FPU helpers take a parameter for CPUState instead
of relying on global env.

Introduce temporary wrappers for FPU load and store ops.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/target-s390x/cc_helper.c b/target-s390x/cc_helper.c
index 2ac1659..9c3a2c4 100644
--- a/target-s390x/cc_helper.c
+++ b/target-s390x/cc_helper.c
@@ -473,10 +473,10 @@
         break;
 
     case CC_OP_LTGT_F32:
-        r = set_cc_f32(src, dst);
+        r = set_cc_f32(env, src, dst);
         break;
     case CC_OP_LTGT_F64:
-        r = set_cc_f64(src, dst);
+        r = set_cc_f64(env, src, dst);
         break;
     case CC_OP_NZ_F32:
         r = set_cc_nz_f32(dst);