bsps: Move interrupt controller support to bsps

This patch is a part of the BSP source reorganization.

Update #3285.

bsps/lm32/shared/irq/irq.c

@@ -0,0 +1,30 @@
+/* irq.c
+ *
+ *  Copyright (c) 2010 Sebastien Bourdeauducq
+ *
+ *  The license and distribution terms for this file may be
+ *  found in found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ */
+
+#include <bsp.h>
+#include <rtems/score/cpu.h>
+#include <bsp/irq.h>
+#include <bsp/irq-generic.h>
+
+rtems_status_code bsp_interrupt_facility_initialize(void)
+{
+  return RTEMS_SUCCESSFUL;
+}
+
+void bsp_interrupt_vector_enable(rtems_vector_number vector)
+{
+  bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector));
+  lm32_interrupt_unmask(1 << vector);
+}
+
+void bsp_interrupt_vector_disable(rtems_vector_number vector)
+{
+  bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector));
+  lm32_interrupt_mask(1 << vector);
+}