[PATCH 2/2] rename spd_conv functions to spd_*

[Andrei Kholodnyi]

> They are used in our modules, yes, but I think he means that they are
> not public, in the sense that if someone writes an independent module
> that is not part of our source tree they can't use them.

Why not? then people need to reinvent these functions each time they need them,
and it makes not much sense to me.
I think we need to make them public since they are used in modules.

> I would agree that these are internal functions.
> I will look at the patches though and see what I think.

Thanks.