Improve the DTS files by removing all the leading "0x" and zeros to fix the
following dtc warnings:

    Warning (unit_address_format): Node /XXX unit name should not have leading "0x"
    Warning (unit_address_format): Node /XXX unit name should not have leading 0s

Converted using the following command:

    find arch/arm/boot/dts -type f \( -iname "*.dts" -o -iname "*.dtsi" \) -exec sed -i \
    -e "s/@\([0-9a-fA-FxX\.;:#]\+\)\s*{/@\L\1 {/g" -e "s/@0x\(.*\) {/@\1 \
    {/g" -e "s/@0\+\(.\+\) {/@\1 {/g" {} +

For simplicity, two sed expressions were used to solve each warnings separately.

To make the regex expression more robust a few other issues were resolved,
namely setting unit-address to lower case, and adding a whitespace before the
the opening curly brace: https://elinux.org/Device_Tree_Linux#Linux_conventions

This will solve also a side effect warning:

    Warning (simple_bus_reg): Node /XXX@<UPPER> simple-bus unit address format error, expected "<lower>"

This is a follow up to commit 4c9847b7 ("dt-bindings: Remove leading 0x from bindings notation")
Reported-by: David Daney <ddaney@caviumnetworks.com>
Suggested-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mathieu Malaterre <malat@debian.org>
[krzk: Rerun the command to include few more changes, adjust the commit msg]
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>