mtd: onenand/omap2: Remove redundant platform_set_drvdata()

Commit 0998d063 (device-core: Ensure drvdata = NULL when no
driver is bound) removes the need to set driver data field to
NULL.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Cc: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Signed-off-by: NArtem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/onenand/omap2.c

@@ -810,7 +810,6 @@ static int omap2_onenand_remove(struct platform_device *pdev)
 	if (c->dma_channel != -1)
 		omap_free_dma(c->dma_channel);
 	omap2_onenand_shutdown(pdev);
-	platform_set_drvdata(pdev, NULL);
 	if (c->gpio_irq) {
 		free_irq(gpio_to_irq(c->gpio_irq), c);
 		gpio_free(c->gpio_irq);