CODEOWNERS: update codeowner for watchdog

adding code owner for snps designware watchdog

Signed-off-by: Balsundar Ponnusamy <balsundar.ponnusamy@intel.com>

CODEOWNERS

@@ -398,7 +398,7 @@
 /drivers/watchdog/Kconfig.it8xxx2         @RuibinChang
 /drivers/watchdog/wdt_counter.c           @nordic-krch
 /drivers/watchdog/*rpi_pico*              @thedjnK
-/drivers/watchdog/*dw*                    @softwarecki
+/drivers/watchdog/*dw*                    @softwarecki @pbalsundar
 /drivers/watchdog/*ifx*                   @sreeramIfx
 /drivers/wifi/esp_at/                     @mniestroj
 /drivers/wifi/eswifi/                     @loicpoulain @nandojve