Fix PIRQ routing abstraction

intel_irq_routing_table is a local structure that should not be used
globally, because it might not be there on all mainboards.

Instead, the API has to be corrected to allow passing a PIRQ table in
where needed.

Change-Id: Icf08928b67727a366639b648bf6aac8e1a87e765
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/1862
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
diff --git a/src/mainboard/pcengines/alix1c/irq_tables.c b/src/mainboard/pcengines/alix1c/irq_tables.c
index 414a930..14a7960 100644
--- a/src/mainboard/pcengines/alix1c/irq_tables.c
+++ b/src/mainboard/pcengines/alix1c/irq_tables.c
@@ -70,7 +70,7 @@
  * The only swizzled interrupt is eth0, where INTA is wired to interrupt controller line B.
  */
 
-const struct irq_routing_table intel_irq_routing_table = {
+static const struct irq_routing_table intel_irq_routing_table = {
 	PIRQ_SIGNATURE,
 	PIRQ_VERSION,
 	32 + 16 * CONFIG_IRQ_SLOT_COUNT,/* Max. number of devices on the bus */
@@ -106,5 +106,5 @@
 
 unsigned long write_pirq_routing_table(unsigned long addr)
 {
-	return copy_pirq_routing_table(addr);
+	return copy_pirq_routing_table(addr, &intel_irq_routing_table);
 }