ACPI / osl: use same type for acpi_predefined_names values as in definition

In the definition of struct acpi_predefined_names, value is of
type char *. Make the OSL override function also work with type
char * (or, more precisely, with a pointer to it).

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/include/acpi/acpiosxf.h b/include/acpi/acpiosxf.h
index 0bc78df..d02df0a 100644
--- a/include/acpi/acpiosxf.h
+++ b/include/acpi/acpiosxf.h
@@ -95,7 +95,7 @@
 #ifndef ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_predefined_override
 acpi_status
 acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
-			    acpi_string * new_val);
+			    char **new_val);
 #endif
 
 #ifndef ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_table_override