i2c: muxes: pca954x: add PCA9546 variant

This adds the PCA9546 4-channel i2c bus switch.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Luca Ceresoli <luca@lucaceresoli.net>
Reviewed-by: Heiko Schocher <hs@denx.de>
2 files changed