fix upload.maximum_size as current partition size 0x140000 for esp32vn-iot-uno & heltec boards (espressif#1052)

Author: erikwilson

boards.txt

@@ -1004,7 +1004,7 @@ mhetesp32minikit.menu.UploadSpeed.512000.upload.speed=512000
 esp32vn-iot-uno.name=ESP32vn IoT Uno
 
 esp32vn-iot-uno.upload.tool=esptool
-esp32vn-iot-uno.upload.maximum_size=1044464
+esp32vn-iot-uno.upload.maximum_size=1310720
 esp32vn-iot-uno.upload.maximum_data_size=294912
 esp32vn-iot-uno.upload.wait_for_upload_port=true
 
@@ -1277,7 +1277,7 @@ m5stack-core-esp32.menu.DebugLevel.verbose.build.code_debug=5
 heltec_wifi_kit_32.name=Heltec_WIFI_Kit_32
 
 heltec_wifi_kit_32.upload.tool=esptool
-heltec_wifi_kit_32.upload.maximum_size=1044464
+heltec_wifi_kit_32.upload.maximum_size=1310720
 heltec_wifi_kit_32.upload.maximum_data_size=294912
 heltec_wifi_kit_32.upload.wait_for_upload_port=true
 
@@ -1320,7 +1320,7 @@ heltec_wifi_kit_32.menu.UploadSpeed.512000.upload.speed=512000
 heltec_wifi_lora_32.name=Heltec_WIFI_LoRa_32
 
 heltec_wifi_lora_32.upload.tool=esptool
-heltec_wifi_lora_32.upload.maximum_size=1044464
+heltec_wifi_lora_32.upload.maximum_size=1310720
 heltec_wifi_lora_32.upload.maximum_data_size=294912
 heltec_wifi_lora_32.upload.wait_for_upload_port=true