[ST] add 3 new platforms : NUCLEO_F439ZI, NUCLEO_F756ZG, NUCLEO_L486RG

Author: adustm

mbed_lstools/lstools_base.py

@@ -102,15 +102,18 @@ def __init__(self):
         "0791": "NUCLEO_F031K6",
         "0795": "DISCO_F429ZI",
         "0796": "NUCLEO_F429ZI",
+        "0797": "NUCLEO_F439ZI",
         "0799": "ST_PLACEHOLDER",
         "0805": "DISCO_L053C8",
         "0810": "DISCO_F334C8",
         "0815": "DISCO_F746NG",
         "0816": "NUCLEO_F746ZG",
         "0817": "DISCO_F769NI",
         "0818": "NUCLEO_F767ZI",
+        "0819": "NUCLEO_F756ZG",
         "0820": "DISCO_L476VG",
         "0824": "LPC824",
+        "0827": "NUCLEO_L486RG",
         "0835": "NUCLEO_F207ZG",
         "0840": "B96B_F446VE",
         "0900": "XPRO_SAMR21",