The function should be spdifib, fix this typo.

Fixes: 423ddc58 ("pinctrl: berlin: add the as370 SoC pinctrl driver")
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Link: https://lore.kernel.org/r/20191011154321.44f08f9a@xhacker.debianSigned-off-by: Linus Walleij <linus.walleij@linaro.org>