watchdog: s3c2410_wdt: Fix the mask bit offset for Exynos7

The watchdog mask bit offset listed for Exynos7 is incorrect.
Fix this.

Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Acked-by: Naveen Krishna Chatradhi <naveenkrishna.ch@gmail.com
Reviewd-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

drivers/watchdog/s3c2410_wdt.c

@@ -161,7 +161,7 @@ static const struct s3c2410_wdt_variant drv_data_exynos5420 = {
 static const struct s3c2410_wdt_variant drv_data_exynos7 = {
 	.disable_reg = EXYNOS5_WDT_DISABLE_REG_OFFSET,
 	.mask_reset_reg = EXYNOS5_WDT_MASK_RESET_REG_OFFSET,
-	.mask_bit = 0,
+	.mask_bit = 23,
 	.rst_stat_reg = EXYNOS5_RST_STAT_REG_OFFSET,
 	.rst_stat_bit = 23,	/* A57 WDTRESET */
 	.quirks = QUIRK_HAS_PMU_CONFIG | QUIRK_HAS_RST_STAT,