[S390] tape: fix tape remove function
[S390] tape: fix tape remove function

Fix a bug introduced with git commit dff59b64af94dc58:
 -       if (cdev->dev.driver_data != NULL) {
 +       if (!dev_get_drvdata(&cdev->dev)) {
These two are not equivalent.

Signed-off-by: Martin Schwidefsky <52616596d8f5df0d597e85ab515377f92f939c68@de.ibm.com>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas