watchdog: keembay: WDT SMC handler MACRO name update

Updated the WDT SMC handler MACRO name to make it clear that its
a ARM SMC handler that helps in clearing the WDT interrupt bit.

Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Kris Pan <kris.pan@intel.com>
Signed-off-by: Shruthi Sanil <shruthi.sanil@intel.com>
Link: https://lore.kernel.org/r/20210517174953.19404-9-shruthi.sanil@intel.com


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