watchdog: mpcore: Remove redundant platform_set_drvdata()

Commit 0998d06310 (device-core: Ensure drvdata = NULL when no
driver is bound) removes the need to set driver data field to
NULL.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

drivers/watchdog/mpcore_wdt.c

@@ -379,8 +379,6 @@ static int mpcore_wdt_probe(struct platform_device *pdev)
 
 static int mpcore_wdt_remove(struct platform_device *pdev)
 {
-	platform_set_drvdata(pdev, NULL);
-
 	misc_deregister(&mpcore_wdt_miscdev);
 
 	mpcore_wdt_pdev = NULL;