testsuite: Adjust expected instruction count for PPC fold testcases.

commit r11-5958 changed the code generation for the vector logical fold
tests.  This patch updates the expected instruction counts for different
instructions.

gcc/testsuite/ChangeLog:

2020-12-16  David Edelsohn  <dje.gcc@gmail.com>

	PR target/98280
	* gcc.target/powerpc/fold-vec-logical-ors-char.c: Adjust count.
	* gcc.target/powerpc/fold-vec-logical-ors-int.c: Adjust count.
	* gcc.target/powerpc/fold-vec-logical-ors-longlong.c: Adjust count.
	* gcc.target/powerpc/fold-vec-logical-ors-short.c: Adjust count.
	* gcc.target/powerpc/fold-vec-logical-other-char.c: Adjust count.
	* gcc.target/powerpc/fold-vec-logical-other-int.c: Adjust count.
	* gcc.target/powerpc/fold-vec-logical-other-longlong.c: Adjust count.
	* gcc.target/powerpc/fold-vec-logical-other-short.c: Adjust count.