[PATCH -next] HSI: ssi_protocol: Fix sparse non static symbol warning

[weiyj_lk]

From: Wei Yongjun <yongjun_wei@xxxxxxxxxxxxxxxxx>

Fixes the following sparse warning:

drivers/hsi/clients/ssi_protocol.c:904:6: warning:
 symbol 'ssip_port_event' was not declared. Should it be static?

Signed-off-by: Wei Yongjun <yongjun_wei@xxxxxxxxxxxxxxxxx>
---
 drivers/hsi/clients/ssi_protocol.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hsi/clients/ssi_protocol.c b/drivers/hsi/clients/ssi_protocol.c
index 737fa2e..e5c7a96 100644
--- a/drivers/hsi/clients/ssi_protocol.c
+++ b/drivers/hsi/clients/ssi_protocol.c
@@ -901,7 +901,7 @@ out:
 	ssip_free_data(msg);
 }
 
-void ssip_port_event(struct hsi_client *cl, unsigned long event)
+static void ssip_port_event(struct hsi_client *cl, unsigned long event)
 {
 	switch (event) {
 	case HSI_EVENT_START_RX:

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