The camera node has both unit address and children within the same bus
mapping, thus needs proper ranges property to fix dtc W=1 warnings:

  Warning (unit_address_vs_reg): /soc/camera@fa600000: node has a unit name, but no reg or ranges property
  Warning (simple_bus_reg): /soc/camera@fa600000: missing or empty reg/ranges property

Subtract 0xfa600000 from all its children nodes.  No functional impact
expected.

Link: https://lore.kernel.org/r/20230722121719.150094-3-krzysztof.kozlowski@linaro.orgSigned-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>