mfd: arizona: Make some symbols static

The sparse tool complains as follows:

drivers/mfd/arizona-spi.c:28:31: warning:
 symbol 'reset_gpios' was not declared. Should it be static?
drivers/mfd/arizona-spi.c:29:31: warning:
 symbol 'ldoena_gpios' was not declared. Should it be static?

Those symbols are not used outside of arizona-spi.c, so this
commit marks them static.

Fixes: e9338367 ("mfd: arizona: Add support for ACPI enumeration of WM5102 connected over SPI")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/arizona-spi.c

@@ -25,8 +25,8 @@
 #include "arizona.h"
 
 #ifdef CONFIG_ACPI
-const struct acpi_gpio_params reset_gpios = { 1, 0, false };
-const struct acpi_gpio_params ldoena_gpios = { 2, 0, false };
+static const struct acpi_gpio_params reset_gpios = { 1, 0, false };
+static const struct acpi_gpio_params ldoena_gpios = { 2, 0, false };
 
 static const struct acpi_gpio_mapping arizona_acpi_gpios[] = {
 	{ "reset-gpios", &reset_gpios, 1, },