allow LINE_PINxx for Teensy 4.x pins (#13247)

fixes https://github.com/qmk/qmk_firmware/issues/13052

lib/python/qmk/info.py

@@ -146,6 +146,9 @@ def _pin_name(pin):
     elif pin[0] in 'ABCDEFGHIJK' and pin[1].isdigit():
         return pin
 
+    elif pin.startswith('LINE_PIN'):
+        return pin
+
     raise ValueError(f'Invalid pin: {pin}')