fix: do not turn off leds when usb suspend is not set

keyboards/planck/ez/ez.c

@@ -22,7 +22,9 @@ keyboard_config_t keyboard_config;
 
 #ifdef RGB_MATRIX_ENABLE
 void suspend_power_down_kb(void) {
+#if RGB_DISABLE_WHEN_USB_SUSPENDED == true
     rgb_matrix_set_color_all(0, 0, 0);
+#endif
     rgb_matrix_set_suspend_state(true);
     suspend_power_down_user();
 }