Driver core: remove class_device_rename

No one uses it, and it wasn't exported to modules, so remove it.  The
only other user of it was the network code, which is now converted to
use struct device instead.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

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

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