hwmon: (nct6775) Drop duplicate NULL check in ->init() and ->exit()

Since platform_device_unregister() is NULL-aware, we don't need to duplicate
this check. Remove it and fold the rest of the code.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Zev Weiss <zev@bewilderbeest.net>
Link: https://lore.kernel.org/r/20220610103324.87483-1-andriy.shevchenko@linux.intel.comSigned-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/nct6775-platform.c

@@ -1200,10 +1200,8 @@ static int __init sensors_nct6775_platform_init(void)
 exit_device_put:
 	platform_device_put(pdev[i]);
 exit_device_unregister:
-	while (--i >= 0) {
-		if (pdev[i])
-			platform_device_unregister(pdev[i]);
-	}
+	while (i--)
+		platform_device_unregister(pdev[i]);
 exit_unregister:
 	platform_driver_unregister(&nct6775_driver);
 	return err;
@@ -1213,10 +1211,8 @@ static void __exit sensors_nct6775_platform_exit(void)
 {
 	int i;
 
-	for (i = 0; i < ARRAY_SIZE(pdev); i++) {
-		if (pdev[i])
-			platform_device_unregister(pdev[i]);
-	}
+	for (i = 0; i < ARRAY_SIZE(pdev); i++)
+		platform_device_unregister(pdev[i]);
 	platform_driver_unregister(&nct6775_driver);
 }