x86/testsuite: Refine AVX10.2 rounding testcases

Using hard byte code is not a good idea in dump file. Add a label
for intel syntax test check to avoid that.

gas/ChangeLog:

	* testsuite/gas/i386/avx10_2-rounding-intel.d: Use label for
	test split.
	* testsuite/gas/i386/avx10_2-rounding.s: Add label to avoid
	hard coding in dump file.
2 files changed