can_ram_get_layout
can_ram_get_layout(&layout, &mcp251xfd_ram_config, NULL, NULL, false);
can_ram_get_layout(&layout, &mcp251xfd_ram_config, NULL, NULL, fd_mode);
can_ram_get_layout(&layout, &mcp251xfd_ram_config, ring, NULL, fd_mode);
can_ram_get_layout(&layout, &mcp251xfd_ram_config, &ring, ec, fd_mode);
void can_ram_get_layout(struct can_ram_layout *layout,
can_ram_get_layout(&layout, &mcp251xfd_ram_config, &ring, &ec, fd_mode);