dmaengine: rcar-dmac: convert to SPDX identifiers

[Vinod Koul <vkoul@kernel.org>]

On 03-07-18, 08:49, Laurent Pinchart wrote:
> Hi Morimoto-san,
> 
> Thank you for the patch.
> 
> On Tuesday, 3 July 2018 03:29:59 EEST Kuninori Morimoto wrote:
> > From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> 
> A commit message would be nice :-)
>  
> > Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> > ---
> >  drivers/dma/sh/rcar-dmac.c | 18 +++++++-----------
> >  1 file changed, 7 insertions(+), 11 deletions(-)
> > 
> > diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c
> > index 79d14af..322e57b 100644
> > --- a/drivers/dma/sh/rcar-dmac.c
> > +++ b/drivers/dma/sh/rcar-dmac.c
> > @@ -1,14 +1,10 @@
> > -/*
> > - * Renesas R-Car Gen2 DMA Controller Driver
> > - *
> > - * Copyright (C) 2014 Renesas Electronics Inc.
> > - *
> > - * Author: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> > - *
> > - * This is free software; you can redistribute it and/or modify
> > - * it under the terms of version 2 of the GNU General Public License as
> > - * published by the Free Software Foundation.
> > - */
> > +// SPDX-License-Identifier: GPL-2.0
> > +//
> > +// Renesas R-Car Gen2 DMA Controller Driver
> > +//
> > +// Copyright (C) 2014 Renesas Electronics Inc.
> > +//
> > +// Author: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> 
> I think the preferred comment style, accordingly to what other drivers do, is
> 
> // SPDX-License-Identifier: GPL-2.0
> /*
>  * Renesas R-Car Gen2 DMA Controller Driver
>  *
>  * Copyright (C) 2014 Renesas Electronics Inc.
>  *
>  * Author: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
>  */

And Linus said this https://lkml.org/lkml/2017/11/25/133

So lets keep C99 style as Morimoto-San proposed.

And high time, this should be documented :)