watchdog: sc1200: Drop unused assignment of pnp_device_id driver data

watchdog: sc1200: Drop unused assignment of pnp_device_id driver data

The driver explicitly sets the .driver_data member of struct
pnp_device_id to zero without relying on that value. Drop this unused
assignments.

While touching this array simplify the list terminator.

This patch doesn't modify the compiled array, only its representation in
source form benefits. The former was confirmed with builds on x86 and
arm64.

Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig@baylibre.com>
Link: https://lore.kernel.org/r/0793f81a854f9e5880ad38f54c8583b3d56e5d60.1781081216.git.u.kleine-koenig@baylibre.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>