[system/core] healthd: remove EPOLLWAKEUP flag for epoll events

kernel will send wakeup events before enter suspend
mode if EPOLLWAKEUP flag set, this will prevent the
system from suspending

Signed-off-by: Firefly <service@t-firefly.com>

system/core/healthd/healthd.cpp

@@ -138,7 +138,7 @@ static void healthd_mode_nop_battery_update(
 int healthd_register_event(int fd, void (*handler)(uint32_t)) {
     struct epoll_event ev;
 
-    ev.events = EPOLLIN | EPOLLWAKEUP;
+    ev.events = EPOLLIN;
     ev.data.ptr = (void *)handler;
     if (epoll_ctl(epollfd, EPOLL_CTL_ADD, fd, &ev) == -1) {
         KLOG_ERROR(LOG_TAG,