selftest: run vector prctl test for ZVE32X

The minimal requirement for running Vector subextension on Linux is
ZVE32X. So change the test accordingly to run prctl as long as it find
it.

Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
Link: https://lore.kernel.org/r/20240510-zve-detection-v5-8-0711bdd26c12@sifive.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

Author: AndybnACT

tools/testing/selftests/riscv/vector/vstate_prctl.c

@@ -88,16 +88,16 @@ int main(void)
 		return -2;
 	}
 
-	if (!(pair.value & RISCV_HWPROBE_IMA_V)) {
+	if (!(pair.value & RISCV_HWPROBE_EXT_ZVE32X)) {
 		rc = prctl(PR_RISCV_V_GET_CONTROL);
 		if (rc != -1 || errno != EINVAL) {
-			ksft_test_result_fail("GET_CONTROL should fail on kernel/hw without V\n");
+			ksft_test_result_fail("GET_CONTROL should fail on kernel/hw without ZVE32X\n");
 			return -3;
 		}
 
 		rc = prctl(PR_RISCV_V_SET_CONTROL, PR_RISCV_V_VSTATE_CTRL_ON);
 		if (rc != -1 || errno != EINVAL) {
-			ksft_test_result_fail("GET_CONTROL should fail on kernel/hw without V\n");
+			ksft_test_result_fail("SET_CONTROL should fail on kernel/hw without ZVE32X\n");
 			return -4;
 		}