[Darwin, PPC, testsuite] Add requires for DFP to two tests.

The two tests use decimal floating point, add the relevant dg-requires
so that they are unsupported on platforms without DFP.

2019-06-22  Iain Sandoe  <iain@sandoe.co.uk>

	* gcc.target/powerpc/pr64205.c: Require effective target dfp.
	* gcc.target/powerpc/pr79909.c: Likewise.

From-SVN: r272592

gcc/testsuite/ChangeLog

 2019-06-22  Iain Sandoe  <iain@sandoe.co.uk>
 
+	* gcc.target/powerpc/pr64205.c: Require effective target dfp.
+	* gcc.target/powerpc/pr79909.c: Likewise.
+
+2019-06-22  Iain Sandoe  <iain@sandoe.co.uk>
+
 	* gcc.target/powerpc/darwin-bool-1.c: Suppress the pedantic
 	warning about _Bool.
 

gcc/testsuite/gcc.target/powerpc/pr64205.c

 /* { dg-do compile { target { powerpc*-*-* && ilp32 } } } */
+/* { dg-require-effective-target dfp } */
 /* { dg-skip-if "" { powerpc*-*-aix* } } */
 /* { dg-options "-O2 -mdejagnu-cpu=G5 -maltivec" } */
 

gcc/testsuite/gcc.target/powerpc/pr79909.c

 /* PR rtl-optimization/79909 */
 /* { dg-do compile } */
 /* { dg-options "-O2 -mxl-compat" } */
+/* { dg-require-effective-target dfp } */
 /* { dg-skip-if "DFP" { powerpc*-*-aix* } } */
 
 typedef float T __attribute__ ((mode (TD)));