mx27: 16-bit wide watchdog registers

Make the watchdog registers 16-bit wide, as they are according to TRM.

Signed-off-by: Leonid Iziumtsev <leonid.iziumtsev@se.atlascopco.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>

arch/arm/cpu/arm926ejs/mx27/reset.c

@@ -27,14 +27,14 @@ void reset_cpu(ulong ignored)
 {
 	struct wdog_regs *regs = (struct wdog_regs *)IMX_WDT_BASE;
 	/* Disable watchdog and set Time-Out field to 0 */
-	writel(0x00000000, &regs->wcr);
+	writew(0x0000, &regs->wcr);
 
 	/* Write Service Sequence */
-	writel(0x00005555, &regs->wsr);
-	writel(0x0000AAAA, &regs->wsr);
+	writew(0x5555, &regs->wsr);
+	writew(0xAAAA, &regs->wsr);
 
 	/* Enable watchdog */
-	writel(WCR_WDE, &regs->wcr);
+	writew(WCR_WDE, &regs->wcr);
 
 	while (1);
 	/*NOTREACHED*/

arch/arm/include/asm/arch-mx27/imx-regs.h

@@ -106,9 +106,9 @@ struct esdramc_regs {
 
 /* Watchdog Registers*/
 struct wdog_regs {
-	u32 wcr;
-	u32 wsr;
-	u32 wstr;
+	u16 wcr;
+	u16 wsr;
+	u16 wstr;
 };
 
 /* PLL registers */