pinctrl: renesas: Set pin type in sh_pfc_config_mux_for_gpio

pinctrl: renesas: Set pin type in sh_pfc_config_mux_for_gpio

Add missing cfg->type = PINMUX_TYPE_GPIO upon successfully setting pin
as a GPIO to retain the pin configuration information.

Signed-off-by: Marek Vasut <[email protected]>
Cc: Alex Kiernan <[email protected]>
Cc: Christoph Muellner <[email protected]>
Cc: Eugeniu Rosca <[email protected]>
Cc: Patrice Chotard <[email protected]>
Cc: Patrick DELAUNAY <[email protected]>
Cc: Philipp Tomsich <[email protected]>
Cc: Simon Glass <[email protected]>