disp: msm: sde: initialize list head of irq node

List head should be initialized after the irq node is allocated.
Change initializes the list head of the node.

Change-Id: I495751fcf2422bba3f39a0719e2d76738b691dd9
Signed-off-by: Lakshmi Narayana Kalavala <lkalaval@codeaurora.org>

msm/sde/sde_crtc.c

@@ -6213,6 +6213,7 @@ static int _sde_crtc_event_enable(struct sde_kms *kms,
 			if (!node)
 				return -ENOMEM;
 			INIT_LIST_HEAD(&node->list);
+			INIT_LIST_HEAD(&node->irq.list);
 			node->func = custom_events[i].func;
 			node->event = event;
 			node->state = IRQ_NOINIT;