rs6000: Fix for the previous abi_v4_pass_in_fpr change

I was a bit over-enthusiastic, we still support xilinxfp.


	* config/rs6000/rs6000.c (abi_v4_pass_in_fpr): Add back the
	TARGET_DOUBLE_FLOAT and TARGET_SINGLE_FLOAT conditions on the DFmode
	resp. SFmode cases.

From-SVN: r258557

gcc/ChangeLog

+2018-03-15  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	* config/rs6000/rs6000.c (abi_v4_pass_in_fpr): Add back the
+	TARGET_DOUBLE_FLOAT and TARGET_SINGLE_FLOAT conditions on the DFmode
+	resp. SFmode cases.
+
 2018-03-15  Tamar Christina  <tamar.christina@arm.com>
 
 	PR target/84711

gcc/config/rs6000/rs6000.c

@@ -11453,9 +11453,9 @@ abi_v4_pass_in_fpr (machine_mode mode, bool named)
 {
   if (!TARGET_HARD_FLOAT)
     return false;
-  if (mode == DFmode)
+  if (TARGET_DOUBLE_FLOAT && mode == DFmode)
     return true;
-  if (mode == SFmode && named)
+  if (TARGET_SINGLE_FLOAT && mode == SFmode && named)
     return true;
   /* ABI_V4 passes complex IBM long double in 8 gprs.
      Stupid, but we can't change the ABI now.  */