driver: i2c: TCA9546A: Rename to TCA954x

Prepare the driver to upcoming support of more mux references.
Rename all TCA9546A related files to TCA954x.
Keep ti,tca9546a and ti,tca9546a-channel compatible
for backward compatibility reasons.
New tca954x-base binding embedding common properties,
tca9546a binding inherits from it and define its own compatibles fields.

Signed-off-by: Aymeric Aillet <aymeric.aillet@iot.bzh>
15 files changed