[CXRD-17] user logging backend for better control

- replace printf with log api

Signed-off-by: Anuj Pathak <[email protected]>

Author: cx-anuj-pathak

app/src/main.c

@@ -1,13 +1,14 @@
-/*
- * Copyright (c) 2012-2014 Wind River Systems, Inc.
- *
- * SPDX-License-Identifier: Apache-2.0
- */
-
-#include <stdio.h>
-
-int main(void)
-{
-	printf("Hello World! %s\n", CONFIG_BOARD);
-	return 0;
-}
+/*
+ * Copyright (c) 2012-2014 Wind River Systems, Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#include <zephyr/logging/log.h>
+
+LOG_MODULE_REGISTER(main);
+
+int main(void)
+{
+	LOG_INF("Hello World! %s\n", CONFIG_BOARD);
+	return 0;
+}