Merge pull request #216 from cyliangtw/master

Add Nuvoton NU_M2354 platform

Author: mark-edgeworth

src/mbed_os_tools/detect/platform_database.py

@@ -239,6 +239,7 @@
         u"1308": u"NUMAKER_IOT_M487",
         u"1309": u"NUMAKER_M252KG",
         u"1310": u"NUMAKER_IOT_M263A",
+        u"1312": u"NU_M2354",
         u"1500": u"RHOMBIO_L476DMW1K",
         u"1549": u"LPC1549",
         u"1600": u"LPC4330_M4",