kselftest/arm64: Test SME on SME only systems in fp-ptrace

When checking that the vector extensions are supported fp-ptrace
currently only checks for SVE being supported which means that we get
into a confused half configured state for SME only systems. Check for
SME as well.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20250718-arm64-fp-ptrace-sme-only-v1-1-3b96dd19a503@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Author: broonie

tools/testing/selftests/arm64/fp/fp-ptrace.c

@@ -1669,7 +1669,7 @@ int main(void)
 	 * Run the test set if there is no SVE or SME, with those we
 	 * have to pick a VL for each run.
 	 */
-	if (!sve_supported()) {
+	if (!sve_supported() && !sme_supported()) {
 		test_config.sve_vl_in = 0;
 		test_config.sve_vl_expected = 0;
 		test_config.sme_vl_in = 0;