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

Pull bugfixes from the i2c mux subsubsystem:

This fixes an old bug in resource cleanup on failure in i2c-mux-reg and
a new log spamming bug from this merge window in the i2c-mux core.