boards: m5stack_atoms3_lite: add support for M5Stack AtomS3 Lite

Add support for M5Stack AtomS3 Lite development board.

The AtomS3 Lite is a smaller version of the AtomS3 that
features only a StatusLED and no LCD display.

Signed-off-by: Martin Kiepfer <mrmarteng@teleschirm.org>