selftests:timers: globals don't need initialization to 0

Global variables do not need to be initialized to 0 and checkpatch
flags this error in tools/testing/selftests/timers/alarmtimer-suspend.c:

ERROR: do not initialise globals to 0
+int final_ret = 0;

Fix this checkpatch error.

Signed-off-by: Zan Aziz <zanaziz313@gmail.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

tools/testing/selftests/timers/alarmtimer-suspend.c

@@ -92,7 +92,7 @@ long long timespec_sub(struct timespec a, struct timespec b)
 	return ret;
 }
 
-int final_ret = 0;
+int final_ret;
 
 void sigalarm(int signo)
 {