dtoverlay: Change node address when "reg" is set
dtoverlay: Change node address when "reg" is set

The DT parameter mechanism has long needed the ability to change node
names to allow the same overlay to be used repeatedly. Many such use
cases can be handled by simply patching the address part of the node
name when the node's "reg" property is written.

See: https://www.raspberrypi.org/forums/viewtopic.php?f=107&t=178721

Signed-off-by: Phil Elwell <e888d2bd6f13f82caa51a37c03d034c76f661ba3@raspberrypi.org>

raspberrypi/userland,raspberrypi/userland,JamesH65/userland,6by9/userland,JamesH65/userland,kraj/userland,6by9/userland,raspberrypi/userland,kraj/userland,6by9/userland,kraj/userland,JamesH65/userland