[DocBook]: Fix two typos in generic IRQ docs.

desc-status --> desc->status

Signed-off-by: David S. Miller <[e-mail]>

Documentation/DocBook/genericirq.tmpl

···
 do {
 	if (desc->status & masked)
 		desc->chip->enable();
-	desc-status &= ~pending;
+	desc->status &= ~pending;
 	handle_IRQ_event(desc->action);
 } while (status & pending);
-desc-status &= ~running;
+desc->status &= ~running;
 desc->chip->end();
 		</programlisting>
 		</para>