rust: device: Add child accessor and iterator

Allow Rust drivers to access children of a fwnode either by name or by
iterating over all of them.

In C, there is the function `fwnode_get_next_child_node` for iteration
and the macro `fwnode_for_each_child_node` that helps with handling the
pointers. Instead of a macro, a native iterator is used in Rust such
that regular for-loops can be used.

Tested-by: Dirk Behme <[email protected]>
Signed-off-by: Remo Senekowitsch <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Danilo Krummrich <[email protected]>

0 files changed, 0 insertions, 0 deletions