tools: selftests: riscv: Add pass message for v_initval_nolibc

Add the pass message after we successfully complete the test.

Fixes: 5c93c4c ("selftests: Test RISC-V Vector's first-use handler")
Signed-off-by: Yong-Xuan Wang <yongxuan.wang@sifive.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Andy Chiu <AndybnAC@gmail.com>
Link: https://lore.kernel.org/r/20241220091730.28006-2-yongxuan.wang@sifive.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

Author: yong-xuan

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

@@ -25,6 +25,8 @@ int main(void)
 	unsigned long vl;
 	char *datap, *tmp;
 
+	ksft_set_plan(1);
+
 	datap = malloc(MAX_VSIZE);
 	if (!datap) {
 		ksft_test_result_fail("fail to allocate memory for size = %d\n", MAX_VSIZE);
@@ -63,6 +65,8 @@ int main(void)
 	}
 
 	free(datap);
+
+	ksft_test_result_pass("tests for v_initval_nolibc pass\n");
 	ksft_exit_pass();
 	return 0;
 }