ACPI: utils: Make acpi_handle_path() not static

acpi_handle_path() will soon be required for node name comparison
elsewhere in ACPI framework. Remove the static keyword and add the
prototype to include/linux/acpi.h.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index abac5cc..202234b 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -559,7 +559,7 @@ EXPORT_SYMBOL(acpi_evaluate_ost);
  *
  * Caller must free the returned buffer
  */
-static char *acpi_handle_path(acpi_handle handle)
+char *acpi_handle_path(acpi_handle handle)
 {
 	struct acpi_buffer buffer = {
 		.length = ACPI_ALLOCATE_BUFFER,