linux-phytec-ti

pinctrl: core: Make dt_free_map optional

Upstream patch https://patchwork.kernel.org/patch/9492369/

If the pin controller driver is using devm_kzalloc, there may not be
anything to do for dt_free_map. Let's make it optional to avoid
unncessary boilerplate code.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Nishanth Menon <nm@ti.com>