feat(esp8266): add phy APIs

1. support save cal data in nvs;
2. support use phy partition to store init data;

In old SDK, we use (max_sec - 3) as init data sector, and (max_sec - 4) as cal data sector. This is changed in IDF style SDK, and these 2 sectors can be used for other perpose.

components/esp8266/source/phy.h

@@ -0,0 +1,38 @@
+// Copyright 2018-2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include "esp_phy_init.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define ESP_CAL_DATA_CHECK_FAIL 1
+
+uint8_t phy_check_data_table(uint32_t *table, uint8_t, uint8_t);
+
+void phy_afterwake_set_rfoption(uint8_t);
+
+void write_data_to_rtc(uint8_t *);
+
+void get_data_from_rtc(uint8_t *);
+
+uint8_t chip_init(uint8_t* init_data, uint8_t *mac);
+
+#ifdef __cplusplus
+}
+#endif
+