ARM: tegra: Fix unit_address_vs_reg and avoid_unnecessary_addr_size DTC warnings

Remove unneeded address/size cells properties and unit addresses to fix
DTC warnings like:

    arch/arm/boot/dts/tegra30-apalis-eval.dtb: Warning (unit_address_vs_reg):
        /i2c@7000d000/stmpe811@41/stmpe_touchscreen@0: node has a unit name, but no reg property
    arch/arm/boot/dts/tegra30-apalis-eval.dtb: Warning (avoid_unnecessary_addr_size):
        /i2c@7000d000/stmpe811@41: unnecessary #address-cells/#size-cells without "ranges" or child "reg" property

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Thierry Reding <treding@nvidia.com>