Correct the device name for M453

Author: Deepika

tools/export/iar/iar_definitions.json

@@ -256,7 +256,7 @@
         "OGChipSelectEditMenu": "NUC472HI8AE\tNuvoton NUC472HI8AE"
     },
     "M453VG6AE": {
-        "OGChipSelectEditMenu": "M451AE series\tNuvoton M451AE series (M451AE,M452AE,M453AE,M451MAE)"
+        "OGChipSelectEditMenu": "M453VG6AE\tNuvoton M453VG6AE"
     },
     "nRF52840_xxAA":{
         "OGChipSelectEditMenu": "nRF52840_xxAA\tNordicSemi nRF52840_xxAA",