Child node of SMD must be either smd-edge or rpm, so the pattern can be
narrowed.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220909125403.803158-7-krzysztof.kozlowski@linaro.orgSigned-off-by: Rob Herring <robh@kernel.org>