boards: board_app_initialize() don't return early on failure

- depending on the situation we're more likely to get actionable user
feedback by allowing boot to complete rather than silently failing

boards/modalai/fc-v1/src/init.c

@@ -277,7 +277,6 @@ __EXPORT int board_app_initialize(uintptr_t arg)
 
 	if (ret != OK) {
 		led_on(LED_RED);
-		return ret;
 	}
 
 #endif /* CONFIG_MMCSD */

boards/modalai/fc-v2/src/init.c

@@ -252,7 +252,6 @@ __EXPORT int board_app_initialize(uintptr_t arg)
 
 	if (ret != OK) {
 		led_on(LED_RED);
-		return ret;
 	}
 
 #endif /* CONFIG_MMCSD */