add flash and PSRAM CS IO acquire function

components/esp32/spiram.c

@@ -296,4 +296,8 @@ bool esp_spiram_is_initialized(void)
     return spiram_inited;
 }
 
+uint8_t esp_spiram_get_cs_io(void)
+{
+    return psram_get_cs_io();
+}
 #endif