Clean up of magic allocators/casts

[Takashi Iwai <tiwai@suse.de>]

Hi,

I applied big patches to clean up the magic allocator/cast and
snd_kcalloc() stuff on ALSA CVS tree.

If you have a local driver code, please correct as the following:

- Replace snd_kcalloc() with kcalloc()

  kcalloc() takes three arguments, two for the normal calloc() and
  the third one as the GFP_* flag.

- Replace snd_magic_kmalloc(), snd_magic_kcalloc(), snd_magic_kfree()
  with kmalloc(), kcalloc() and kfree(), respectively.
  Also, replace snd_magic_cast() with the normal cast.

  The magic-cast check facility is no longer provided on ALSA tree
  to simplify the code base.

- _snd_pcm_substream_chip(), _snd_timer_chip() are _snd_control_chip()
  replaced with the one without the first underscore
  (e.g. snd_pcm_substream_chip()).

- No longer need to define chip_t.
  Because we don't have magic-cast, it's useless now.


After CVS update, please run cvscompile to rebuild the configure
script.


If someone still wants a magic-cast check, I'll consider to provide in
a different way (without implementing it implicitly in the allocator),
but it won't appear in alsa-kernel tree but only in alsa-driver tree
anyway.


thanks,

Takashi


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