ALSA: asihpi: fix comment syntax in file headers

The opening comment mark '/**' is used for highlighting the beginning of
kernel-doc comments.
There are files in sound/pci/asihpi which follow this syntax in their file
headers, i.e. start with '/**' like comments, which causes unexpected
warnings from kernel-doc.

E.g., running scripts/kernel-doc -none on sound/pci/asihpi/hpidspcd.h
causes this warning:
"warning: Cannot understand
 on line 4 - I thought it was a doc line"

Provide a simple fix by replacing the kernel-doc like comment syntax with
general format, i.e. "/*", to prevent kernel-doc from parsing it.
Signed-off-by: Aditya Srivastava <yashsri421@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20210317202144.20290-1-yashsri421@gmail.comSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/asihpi/hpicmn.h

 /* SPDX-License-Identifier: GPL-2.0-only */
-/**
+/*
 
     AudioScience HPI driver
     Copyright (C) 1997-2014  AudioScience Inc. <support@audioscience.com>

sound/pci/asihpi/hpidspcd.h

 /* SPDX-License-Identifier: GPL-2.0-only */
 /***********************************************************************/
-/**
+/*
 
     AudioScience HPI driver
     Copyright (C) 1997-2011  AudioScience Inc. <support@audioscience.com>