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: Dmitry Torokhov <dmitry.torokhov@gmail.com>
 
 error_map:
        release_mem_region(kp->res->start, resource_size(kp->res));
 error_res:
-       platform_set_drvdata(pdev, NULL);
        kfree(kp);
        return error;
 }
        clk_put(kp->clk);
        iounmap(kp->regs);
        release_mem_region(kp->res->start, resource_size(kp->res));
-       platform_set_drvdata(pdev, NULL);
        kfree(kp);
 
        return 0;