Merge pull request #272 from MaximIntegrated/add-MAX32660EVSYS

Add platform ID for MAX32660EVSYS

Author: Patater

src/mbed_os_tools/detect/platform_database.py

@@ -80,6 +80,7 @@
         u"0416": u"MAX32625PICO",
         u"0418": u"MAX32620FTHR",
         u"0419": u"MAX35103EVKIT2",
+        u"0421": u"MAX32660EVSYS",
         u"0450": u"MTB_UBLOX_ODIN_W2",
         u"0451": u"MTB_MXCHIP_EMW3166",
         u"0452": u"MTB_LAIRD_BL600",