spi_flash: move the unlock patch to bootloader and add support for GD

components/bootloader_support/include/bootloader_flash.h

@@ -10,6 +10,10 @@
 #include "sdkconfig.h"
 #include "soc/soc_caps.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #if SOC_CACHE_SUPPORT_WRAP
 /**
  * @brief Set the burst mode setting command for specified wrap mode.
@@ -19,3 +23,15 @@
  */
 esp_err_t bootloader_flash_wrap_set(spi_flash_wrap_mode_t mode);
 #endif
+
+/**
+  * @brief Unlock Flash write protect.
+  *        Please do not call this function in SDK.
+  *
+  * @note This can be overridden because it's attribute weak.
+  */
+esp_err_t bootloader_flash_unlock(void);
+
+#ifdef __cplusplus
+}
+#endif