[PATCH] scsi: mpt3sas: Mark expected switch fall-through

["Gustavo A. R. Silva" <gustavo@xxxxxxxxxxxxxx>]

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

This patch fixes the following warning:

drivers/scsi/mpt3sas/mpt3sas_base.c: In function ‘_base_update_ioc_page1_inlinewith_perf_mode’:
drivers/scsi/mpt3sas/mpt3sas_base.c:4510:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
   if (ioc->high_iops_queues) {
      ^
drivers/scsi/mpt3sas/mpt3sas_base.c:4530:2: note: here
  case MPT_PERF_MODE_LATENCY:
  ^~~~

Warning level 3 was used: -Wimplicit-fallthrough=3

This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>
---
 drivers/scsi/mpt3sas/mpt3sas_base.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
index e6377ec07f6c..9fefcd1e9c97 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -4527,6 +4527,7 @@ _base_update_ioc_page1_inlinewith_perf_mode(struct MPT3SAS_ADAPTER *ioc)
 			ioc_info(ioc, "performance mode: balanced\n");
 			return;
 		}
+		/* Fall through */
 	case MPT_PERF_MODE_LATENCY:
 		/*
 		 * Enable interrupt coalescing on all reply queues
-- 
2.21.0