watchdog: hpwdt: Assign boolean values to a bool variable

Fix the following coccicheck warnings:

 ./drivers/watchdog/hpwdt.c:345:2-12: WARNING: Assignment of
0/1 to bool variable.

./drivers/watchdog/hpwdt.c:126:2-12: WARNING: Assignment of
0/1 to bool variable.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Zhong <abaci-bugfix@linux.alibaba.com>
Reviewed-by: Jerry Hoemann <jerry.hoemann@hpe.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/1611128890-79204-1-git-send-email-abaci-bugfix@linux.alibaba.com


Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>