extcon: fsa9480: Rewrite bindings in YAML and extend

This rewrites the FSA9480 DT bindings using YAML and
extends them with the compatible TI TSU6111.

I chose to name the file fcs,fsa880 since this is the
first switch, later versions are improvements.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>