timer: Fix two mistakes in callback conversions

Two errors found their way into the timer callback conversions that
weren't noticed with x86 allmodconfig.

Reported-by: kernel test robot <lkp@01.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20171005171035.GA34831@beast

drivers/hsi/clients/ssi_protocol.c

@@ -499,7 +499,7 @@ static void ssip_rx_wd(struct timer_list *t)
 	ssip_error(cl);
 }
 
-static void ssip_tx_wd(unsigned long data)
+static void ssip_tx_wd(struct timer_list *t)
 {
 	struct ssi_protocol *ssi = from_timer(ssi, t, tx_wd);
 	struct hsi_client *cl = ssi->cl;