fix(esp8266): Fix esp8266 load RTC segment when reset from deep sleep

Now only 1MB flash is mapped to SoC bus.

components/esp8266/include/internal/esp_system_internal.h

@@ -15,6 +15,7 @@
 #pragma once
 
 #include <stdint.h>
+#include <esp_system.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -48,6 +49,13 @@ void esp_reset_reason_init(void);
  */
 void esp_reset_reason_set_hint(esp_reset_reason_t hint);
 
+/**
+ * @brief  Get reason of last reset but not clear it for next reset
+ *
+ * @return See description of esp_reset_reason_t for explanation of each value.
+ */
+esp_reset_reason_t esp_reset_reason_early(void);
+
 #ifdef __cplusplus
 }
 #endif