Adding us ticker to SAML21

Hasnain Virk · janjongboom · commit 8891b85286b6 · 2019-03-04T11:26:34.000+01:00
diff --git a/targets/targets.json b/targets/targets.json
@@ -6517,6 +6517,7 @@
             "PORTINOUT",
             "PORTOUT",
             "PWMOUT",
+            "USTICKER",
             "RTC",
             "SERIAL",
             "SERIAL_ASYNCH",
