[SCSI] megaraid_sas: Add CFG_CLEARED AEN

The following patch for megaraid_sas adds a missing check for
MR_EVT_CFG_CLEARED in megasas_aen_polling().

Signed-off-by: Adam Radford <aradford@gmail.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index a521e1a..1789a1c 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -5196,6 +5196,7 @@
 			break;
 
 		case MR_EVT_LD_OFFLINE:
+		case MR_EVT_CFG_CLEARED:
 		case MR_EVT_LD_DELETED:
 			megasas_get_ld_list(instance);
 			for (i = 0; i < MEGASAS_MAX_LD_CHANNELS; i++) {