irqdomain: Remove temporary MIPS workaround code

The MIPS interrupt controllers are all registering their own irq_domains
now. Drop the MIPS specific code because it is no longer needed.
Signed-off-by: NGrant Likely <grant.likely@linaro.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/5458/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

kernel/irq/irqdomain.c

@@ -665,18 +665,6 @@ unsigned int irq_create_of_mapping(struct device_node *controller,
 
 	domain = controller ? irq_find_host(controller) : irq_default_domain;
 	if (!domain) {
-#ifdef CONFIG_MIPS
-		/*
-		 * Workaround to avoid breaking interrupt controller drivers
-		 * that don't yet register an irq_domain.  This is temporary
-		 * code. ~~~gcl, Feb 24, 2012
-		 *
-		 * Scheduled for removal in Linux v3.6.  That should be enough
-		 * time.
-		 */
-		if (intsize > 0)
-			return intspec[0];
-#endif
 		pr_warning("no irq domain found for %s !\n",
 			   of_node_full_name(controller));
 		return 0;