Adds initial support for Artery MCUs ( https://www.arterytek.com/cn/product/AT32F415.jsp )
Nothing fancy yet, but support enough to flash and debug a program to an AT32F415 MCU using a ST-LINK programmer.
Code heavily inspired from the stm32f2x.c file.
Clean checkpatch.sh output
Signed-off-by: Pilatomic <pilatomic@gmail.com>
Change-Id: Ifbf5368ab635852d1773a2df3288503fe0d05af0