crypto: qat - remove cast for mailbox CSR

Remove cast for mailbox CSR in adf_admin.c as it is not needed.
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Adam Guerin <adam.guerin@intel.com>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/qat/qat_common/adf_admin.c

@@ -254,7 +254,7 @@ int adf_init_admin_comms(struct adf_accel_dev *accel_dev)
 	hw_data->get_admin_info(&admin_csrs_info);
 
 	mailbox_offset = admin_csrs_info.mailbox_offset;
-	mailbox = (void __iomem *)((uintptr_t)csr + mailbox_offset);
+	mailbox = csr + mailbox_offset;
 	adminmsg_u = admin_csrs_info.admin_msg_ur;
 	adminmsg_l = admin_csrs_info.admin_msg_lr;