026d48e85a
Avoid clearing the reg property in the memory DT node if no memory banks have been specified for a board (CONFIG_NR_DRAM_BANKS == 0). This allows boards to let U-Boot skip the DT memory tinkering in case other firmware has already setup the node properly before. This should be safe as all callers of fdt_fixup_memory_banks that use a computed <banks> value put at least 1 in there. Add some documentation comments to the header file. Signed-off-by: Firefly <service@t-firefly.com> Acked-by: Firefly <service@t-firefly.com>