target/s390x: Mark FPSEH facility as available

This facility bit includes DFP-rounding, FPR-GR-transfer,
FPS-sign-handling, and IEEE-exception-simulation.  We do
support all of these.

Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>

target/s390x/cpu_models.c

@@ -685,6 +685,7 @@ static void add_qemu_cpu_model_features(S390FeatBitmap fbm)
         S390_FEAT_MOVE_WITH_OPTIONAL_SPEC,
         S390_FEAT_GENERAL_INSTRUCTIONS_EXT,
         S390_FEAT_EXECUTE_EXT,
+        S390_FEAT_FLOATING_POINT_SUPPPORT_ENH,
         S390_FEAT_STFLE_45,
     };
     int i;