ASoC: soc-jack: cleanup cppcheck warning for CONFIG_GPIOLIB

ASoC: soc-jack: cleanup cppcheck warning for CONFIG_GPIOLIB

This patch cleanups below cppcheck warning.

sound/soc/soc-jack.c:21:6: style: struct member 'jack_gpio_tbl::count' is never used. [unusedStructMember]
 int count;
     ^
sound/soc/soc-jack.c:23:28: style: struct member 'jack_gpio_tbl::gpios' is never used. [unusedStructMember]
 struct snd_soc_jack_gpio *gpios;
                           ^

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87tujqyols.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>