feat(interrupts): modify interrupt properties in runtime

At present, the 'reconfigure interrupt' paravirtualized interface only
allows to change the sec state, and the target CPU of the interrupt.

Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
Change-Id: Ie8780b6854314754ad948723d77c8dba68ae0c00
diff --git a/src/vm.c b/src/vm.c
index 1b7ae9d..ec1e374 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -988,7 +988,7 @@
  * Obtain the interrupt descriptor entry of the specified vm corresponding
  * to the specific interrupt id.
  */
-struct interrupt_descriptor *vm_find_interrupt_descriptor(
+static struct interrupt_descriptor *vm_find_interrupt_descriptor(
 	struct vm_locked vm_locked, uint32_t id)
 {
 	for (uint32_t i = 0; i < HF_NUM_INTIDS; i++) {