Each syscon node must come with a dedicated/specific compatible, which
is also reported by dtbs_check:

  juno.dtb: apbregs@10000: compatible: ['syscon', 'simple-mfd'] is too short
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240518203903.119608-2-krzysztof.kozlowski@linaro.orgSigned-off-by: Sudeep Holla <sudeep.holla@arm.com>