soc: loongson: loongson_pm2: Drop useless of_device_id compatible

Now, "loongson,ls2k0500-pmc" is used as fallback compatible, so the
ls2k1000 compatible in the driver can be dropped directly.

Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

drivers/soc/loongson/loongson2_pm.c

@@ -197,7 +197,6 @@ static int loongson2_pm_probe(struct platform_device *pdev)
 
 static const struct of_device_id loongson2_pm_match[] = {
 	{ .compatible = "loongson,ls2k0500-pmc", },
-	{ .compatible = "loongson,ls2k1000-pmc", },
 	{},
 };