Fix dtschema validator warnings like:
    l2-cache: $nodename:0: 'l2-cache' does not match '^(cache-controller|cpu)(@[0-9a-f,]+)*$'
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20200626080534.3400-1-krzk@kernel.orgSigned-off-by: Linus Walleij <linus.walleij@linaro.org>