crypto: qat - change return value in adf_cfg_add_key_value_param()

If the parameter type provided to adf_cfg_add_key_value_param()
is invalid, return -EINVAL instead of -1 that is treated as -EPERM and
may confuse.
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/qat/qat_common/adf_cfg.c

@@ -243,7 +243,7 @@ int adf_cfg_add_key_value_param(struct adf_accel_dev *accel_dev,
 	} else {
 		dev_err(&GET_DEV(accel_dev), "Unknown type given.\n");
 		kfree(key_val);
-		return -1;
+		return -EINVAL;
 	}
 	key_val->type = type;
 	down_write(&cfg->lock);