misc: genwqe: card_base: Fix some kernel-doc warnings

Fixes the following W=1 kernel build warning(s):
  drivers/misc/genwqe/card_base.c:3: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
Signed-off-by: NBo Liu <liubo03@inspur.com>
Link: https://lore.kernel.org/r/20221031063557.2710-1-liubo03@inspur.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/genwqe/card_base.c

 // SPDX-License-Identifier: GPL-2.0-only
-/**
+/*
  * IBM Accelerator Family 'GenWQE'
  *
  * (C) Copyright IBM Corp. 2013