boot/espressif: Add hal subdirectory for IDF sources and headers

Signed-off-by: Shubham Kulkarni <shubham.kulkarni@espressif.com>
diff --git a/boot/espressif/hal/include/esp_log.h b/boot/espressif/hal/include/esp_log.h
new file mode 100644
index 0000000..a55640e
--- /dev/null
+++ b/boot/espressif/hal/include/esp_log.h
@@ -0,0 +1,13 @@
+/*
+ * Copyright (c) 2021 Espressif Systems (Shanghai) Co., Ltd.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#pragma once
+#include <mcuboot_config/mcuboot_logging.h>
+
+#define ESP_LOGE(tag, fmt, ...) MCUBOOT_LOG_ERR(fmt, ##__VA_ARGS__)
+#define ESP_LOGW(tag, fmt, ...) MCUBOOT_LOG_WRN(fmt, ##__VA_ARGS__)
+#define ESP_LOGI(tag, fmt, ...) MCUBOOT_LOG_INF(fmt, ##__VA_ARGS__)
+#define ESP_LOGD(tag, fmt, ...) MCUBOOT_LOG_DBG(fmt, ##__VA_ARGS__)