fl16: Use core powerdown and wakeup function

Don't try to outsmart the core quantum logic, let it handle the hard
stuff.

Signed-off-by: Daniel Schaefer <dhs@frame.work>

Author: JohnAZoidberg

keyboards/framework/matrix.c

@@ -262,6 +262,17 @@ static adc10ksample_t read_adc(void) {
 bool handle_idle(void) {
     bool lid_closed = !readPin(SLEEP_GPIO);
 
+    // If lid state is different from current suspend state,
+    // adjust suspend state
+    if (is_suspended != lid_closed) {
+        if lid_closed {
+            suspend_power_down();
+        } else {
+            suspend_wakeup_init();
+        }
+    }
+    return lid_closed;
+
     bool disable_backlight = lid_closed || is_suspended;
     if (disable_backlight) {
         led_suspend();