gpio: of: Fix bogus reference to gpiod_get_count()

The recommended function is called gpiod_count(), not gpiod_get_count().

Fixes: f626d6df ("gpio: of: Break out OF-only code")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20191120154521.16273-1-geert+renesas@glider.be


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>