gpiolib: acpi: Add missing memset(0) to acpi_get_gpiod_from_data()

When refactoring the acpi_get_gpiod_from_data() the change missed
cleaning up the variable on stack. Add missing memset().

Reported-by: Ferry Toth <[email protected]>
Fixes: 16ba046 ("gpiolib: acpi: teach acpi_find_gpio() to handle data-only nodes")
Signed-off-by: Andy Shevchenko <[email protected]>
Reviewed-by: Dmitry Torokhov <[email protected]>
Signed-off-by: Bartosz Golaszewski <[email protected]>

Author: andy-shev

drivers/gpio/gpiolib-acpi.c

@@ -951,6 +951,7 @@ static struct gpio_desc *acpi_get_gpiod_from_data(struct fwnode_handle *fwnode,
 	if (!propname)
 		return ERR_PTR(-EINVAL);
 
+	memset(&lookup, 0, sizeof(lookup));
 	lookup.index = index;
 
 	ret = acpi_gpio_property_lookup(fwnode, propname, index, &lookup);