Merge branch 'greybus' into staging-testing

This merges the greybus branch into staging-testing.  It contains the
drivers/staging/greybus/ subsystem and related drivers and has passed
the 0-day bot tests so no builds should break.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc MAINTAINERS
Simple merge

diff --cc drivers/staging/Kconfig
Simple merge

diff --cc drivers/staging/Makefile
Simple merge