auxdisplay: seg-led-gpio: use gpiod_multi_set_value_cansleep

Reduce verbosity by using gpiod_multi_set_value_cansleep() instead of
gpiod_set_array_value_cansleep().

Acked-by: Andy Shevchenko <andy@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>