ARM: shmobile: sh73a0: remove "0x" prefix from DT node names

The convention for Device Tree node names is <device>@<hex-address>, where
the part after '@' shouldn't contain the "0x" prefix. Fix the sh73a0.dtsi
DT names.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>