Merge tag 'dev_groups_all_drivers' into driver-core-next

dev_groups added to struct driver

Persistent tag for others to pull this branch from

This is the first patch in a longer series that adds the ability for the
driver core to create and remove a list of attribute groups
automatically when the device is bound/unbound from a specific driver.

See:
	https://lore.kernel.org/r/20190731124349[email protected]
for details on this patch, and examples of how to use it in other
drivers.

Signed-off-by: Greg Kroah-Hartman <[email protected]>

diff --cc drivers/base/dd.c
Simple merge

diff --cc include/linux/device.h
Simple merge