hpwdt: Only BYTE reads/writes to WD Timer port 0x72

This patch is to correct the use of the iLO port 0x72 usage.
The port 0x72 is a byte size write/read and hpwdt is currently
writing a WORD.

Signed-off by: Thomas Mingarelli <thomas.mingarelli@hp.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

drivers/watchdog/hpwdt.c

@@ -435,16 +435,16 @@ static void hpwdt_start(void)
 {
 	reload = SECS_TO_TICKS(soft_margin);
 	iowrite16(reload, hpwdt_timer_reg);
-	iowrite16(0x85, hpwdt_timer_con);
+	iowrite8(0x85, hpwdt_timer_con);
 }
 
 static void hpwdt_stop(void)
 {
 	unsigned long data;
 
-	data = ioread16(hpwdt_timer_con);
+	data = ioread8(hpwdt_timer_con);
 	data &= 0xFE;
-	iowrite16(data, hpwdt_timer_con);
+	iowrite8(data, hpwdt_timer_con);
 }
 
 static void hpwdt_ping(void)