Documentation: ACPI: _DSD: enable hyperlink in final references

For inline web links, no special markup is needed.

Signed-off-by: Flavio Suligoi <f.suligoi@asem.it>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
[ rjw: Subject edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>