selftests/cpu-hotplug: Add log info when test success

Add log information when run full test successfully.
Signed-off-by: Zhao Gongyi <zhaogongyi@huawei.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

tools/testing/selftests/cpu-hotplug/Makefile

@@ -6,6 +6,6 @@ TEST_PROGS := cpu-on-off-test.sh
 include ../lib.mk
 
 run_full_test:
-	@/bin/bash ./cpu-on-off-test.sh -a || echo "cpu-hotplug selftests: [FAIL]"
+	@/bin/bash ./cpu-on-off-test.sh -a && echo "cpu-hotplug selftests: [PASS]" || echo "cpu-hotplug selftests: [FAIL]"
 
 clean: