ACPI: scan: Make acpi_walk_dep_device_list()

Because acpi_walk_dep_device_list() is only called by the code in the
file in which it is defined, make it static, drop the export of it
and drop its header from acpi.h.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>

drivers/acpi/scan.c

@@ -2139,9 +2139,9 @@ static int acpi_scan_clear_dep(struct acpi_dep_data *dep, void *data)
  * negative value is returned by the callback then the loop is broken and that
  * value is returned as the final error.
  */
-int acpi_walk_dep_device_list(acpi_handle handle,
-			      int (*callback)(struct acpi_dep_data *, void *),
-			      void *data)
+static int acpi_walk_dep_device_list(acpi_handle handle,
+				int (*callback)(struct acpi_dep_data *, void *),
+				void *data)
 {
 	struct acpi_dep_data *dep, *tmp;
 	int ret = 0;
@@ -2158,7 +2158,6 @@ int acpi_walk_dep_device_list(acpi_handle handle,
 
 	return ret > 0 ? 0 : ret;
 }
-EXPORT_SYMBOL_GPL(acpi_walk_dep_device_list);
 
 /**
  * acpi_dev_clear_dependencies - Inform consumers that the device is now active

include/linux/acpi.h

@@ -666,9 +666,6 @@ extern bool acpi_driver_match_device(struct device *dev,
 				     const struct device_driver *drv);
 int acpi_device_uevent_modalias(struct device *, struct kobj_uevent_env *);
 int acpi_device_modalias(struct device *, char *, int);
-int acpi_walk_dep_device_list(acpi_handle handle,
-			      int (*callback)(struct acpi_dep_data *, void *),
-			      void *data);
 
 struct platform_device *acpi_create_platform_device(struct acpi_device *,
 						    struct property_entry *);