atmel-samd: Switch to https for freetouch submodule.

Author: tannewt

.gitmodules

@@ -11,6 +11,6 @@
 [submodule "lib/berkeley-db-1.xx"]
 	path = lib/berkeley-db-1.xx
 	url = https://github.com/pfalcon/berkeley-db-1.xx
-[submodule "atmel-samd/freetouch"]
+[submodule "freetouch2"]
 	path = atmel-samd/freetouch
-	url = git@github.com:adafruit/Adafruit_FreeTouch.git
+	url = https://github.com/adafruit/Adafruit_FreeTouch.git