ipmi:ssif: Add send_retries increment

A recent change removed an increment of send_retries, re-add it.

Fixes: 95767ed7 ipmi:ssif: resend_msg() cannot fail
Reported-by: Pavel Machek <pavel@denx.de>
Cc: stable@vger.kernel.org
Signed-off-by: Corey Minyard <minyard@acm.org>

drivers/char/ipmi/ipmi_ssif.c

@@ -557,8 +557,10 @@ static void retry_timeout(struct timer_list *t)
 
 	if (waiting)
 		start_get(ssif_info);
-	if (resend)
+	if (resend) {
 		start_resend(ssif_info);
+		ssif_inc_stat(ssif_info, send_retries);
+	}
 }
 
 static void watch_timeout(struct timer_list *t)