[WATCHDOG] Make w83697h_wdt void-like functions void

Some non-exported functions always returned 0. Mark them void instead.

Signed-off-by: Samuel Tardieu <sam@rfc1149.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

diff --git a/drivers/watchdog/w83697hf_wdt.c b/drivers/watchdog/w83697hf_wdt.c
index c622a0e..b534174 100644
--- a/drivers/watchdog/w83697hf_wdt.c
+++ b/drivers/watchdog/w83697hf_wdt.c
@@ -140,7 +140,7 @@
 	w83697hf_deselect_wdt();
 }
 
-static int
+static void
 wdt_ping(void)
 {
 	spin_lock(&io_lock);
@@ -150,10 +150,9 @@
 
 	w83697hf_deselect_wdt();
 	spin_unlock(&io_lock);
-	return 0;
 }
 
-static int
+static void
 wdt_enable(void)
 {
 	spin_lock(&io_lock);
@@ -164,10 +163,9 @@
 
 	w83697hf_deselect_wdt();
 	spin_unlock(&io_lock);
-	return 0;
 }
 
-static int
+static void
 wdt_disable(void)
 {
 	spin_lock(&io_lock);
@@ -178,7 +176,6 @@
 
 	w83697hf_deselect_wdt();
 	spin_unlock(&io_lock);
-	return 0;
 }
 
 static int