Merge branch 'i2c-mux/for-next' of https://github.com/peda-r/i2c-mux into i2c/for-5.2

Mainly some pca954x work, i.e. removal of unused platform data support
and added support for sysfs interface for manipulating/examining the
idle state. And then a mechanical cocci-style patch.

diff --cc Documentation/devicetree/bindings/i2c/i2c-mt65xx.txt
Simple merge

diff --cc MAINTAINERS
Simple merge

diff --cc drivers/i2c/busses/Kconfig
Simple merge

diff --cc drivers/i2c/muxes/i2c-demux-pinctrl.c
Simple merge