boards: rp2040: fix missing ranges for RP2040-based boards

Add the `ranges` property to the flash node on RP2040-based boards to
correctly specify the base address and size for child nodes. This aligns
the board device trees with expected Zephyr DT conventions and ensures
proper address translation for flash partitions and other child nodes.

Signed-off-by: David Schneider <schneidav81@gmail.com>
16 files changed