Add attiny1617 to tinyMegaCore section of build platforms

Author: PaintYourDragon

build_platform.py

@@ -130,7 +130,8 @@
     "feather_rp2040_tinyusb" : ["rp2040:rp2040:adafruit_feather:flash=8388608_0,freq=125,dbgport=Disabled,dbglvl=None,usbstack=tinyusb", "0xe48bff56"],
     "qt2040_trinkey" : ["rp2040:rp2040:adafruit_trinkeyrp2040qt:freq=125,flash=8388608_0", "0xe48bff56"],
     "qt2040_trinkey_tinyusb" : ["rp2040:rp2040:adafruit_trinkeyrp2040qt:flash=8388608_0,freq=125,dbgport=Disabled,dbglvl=None,usbstack=tinyusb", "0xe48bff56"],
-    # Attiny8xy (SpenceKonde)
+    # Attiny8xy and 16xy (SpenceKonde)
+    "attiny1617" : ["megaTinyCore:megaavr:atxy7:chip=1617", None],
     "attiny817" : ["megaTinyCore:megaavr:atxy7:chip=817", None],
     "attiny816" : ["megaTinyCore:megaavr:atxy6:chip=816", None],
     "attiny807" : ["megaTinyCore:megaavr:atxy7:chip=807", None],