ARM: shmobile: bockw dts: Move Ethernet node to BSC

Move the Ethernet node to the new BSC node, as its connected to the
Bus State Controller.

Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
[horms: dropped compat string changes as they seem out of scope]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>