Use correct SERCOM for SDA/SCL on Grand Central

dhalbert · dhalbert · commit 6eecf96710f7 · 2019-01-11T19:06:46.000-05:00
diff --git a/ports/atmel-samd/peripherals b/ports/atmel-samd/peripherals
@@ -1 +1 @@
-Subproject commit f3bd5b1fd96f2ab0dde5cad61d41e607061ed46c
+Subproject commit 235cb97d72648ec2889aba25ff4a34c4f32e2ac3
