gpio: gpio-mlxbf2: Tell the compiler that ACPI functions may not be use
... as is the case when !CONFIG_ACPI. Fixes the following W=1 kernel build warning: drivers/gpio/gpio-mlxbf2.c:312:36: warning: ‘mlxbf2_gpio_acpi_match’ defined but not used [-Wunused-const-variable=] 312 | static const struct acpi_device_id mlxbf2_gpio_acpi_match[] = { | ^~~~~~~~~~~~~~~~~~~~~~ Signed-off-by: Lee Jones <lee.jones@linaro.org> Reviewed-by: Asmaa Mnebhi <asmaa@mellanox.com> Cc: Asmaa Mnebhi <Asmaa@mellanox.com> Link: https://lore.kernel.org/r/20200630133345.2232932-10-lee.jones@linaro.org Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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