lengthen RP2040 xosc startup time

dhalbert · dhalbert · commit 6af36757a7aa · 2021-06-02T08:50:20.000-04:00
diff --git a/ports/raspberrypi/sdk b/ports/raspberrypi/sdk
@@ -1 +1 @@
-Subproject commit 7a6660134ac6242e3223fe1c78b248caf6b2cbf4
+Subproject commit 49c0c1613dca37eea85f168290e858cca4411d81
