PR 100167: Fix vector long long multiply/divide tests on power10.

PR 100167: Fix vector long long multiply/divide tests on power10.

This patch updates the vector long long multiply and divide tests to
supply the correct code information if power10 code generation is used.

gcc/testsuite/
2021-06-09  Michael Meissner  <meissner@linux.ibm.com>

	PR testsuite/100167
	* gcc.target/powerpc/fold-vec-div-longlong.c:
	* gcc.target/powerpc/fold-vec-mult-longlong.c: Fix expected code
	generation on power10.