intel_idle: close avn_cstates array with correct marker

Close avn_cstates array with correct marker to avoid overflow
in function intel_idle_cpu_init().

[rjw: The problem was introduced when commit 22e580d07f65 was merged
 on top of eba682a5aeb6 (intel_idle: shrink states tables).]

Fixes: 22e580d07f65 (intel_idle: Fixed C6 state on Avoton/Rangeley processors)
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 6f456f0..797ed29 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -329,7 +329,7 @@
 	{
 		.enter = NULL }
 };
-static struct cpuidle_state avn_cstates[] __initdata = {
+static struct cpuidle_state avn_cstates[] = {
 	{
 		.name = "C1-AVN",
 		.desc = "MWAIT 0x00",
@@ -344,6 +344,8 @@
 		.exit_latency = 15,
 		.target_residency = 45,
 		.enter = &intel_idle },
+	{
+		.enter = NULL }
 };
 
 /**