submodule move and sync

Author: hierophect

.gitmodules

@@ -96,8 +96,8 @@
 [submodule "frozen/circuitpython-stage"]
 	path = frozen/circuitpython-stage
 	url = https://github.com/python-ugame/circuitpython-stage.git
-[submodule "ports/stm32f4/stm32f4"]
-	path = ports/stm32f4/stm32f4
+[submodule "ports/stm/stm32f4"]
+	path = ports/stm/stm32f4
 	url = https://github.com/adafruit/stm32f4.git
 [submodule "ports/cxd56/spresense-exported-sdk"]
 	path = ports/cxd56/spresense-exported-sdk