board-nokia-770.c: Add missing alsa platform driver code

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I checked the mailing list archive, and I do not see any answer regarding Mika's alsa patch for alsa and the 770.

Since Nokia released the 2.0 beta for 770, I hoped Nokia would have ALSA support enabled, but it seems not.

So I went ahead and rebuilt the Nokia 2.6.16-omap1 kernel with Mika's ALSA patch
(http://linux.omap.com/pipermail/linux-omap-open-source/2006-April/006868.html),

installed the kernel, and booted. Low and behold the OMAP_ALSA card appears in /proc/asound/cards on the 770!

After this, I build the libasound2 package in scratchbox (using ubuntu
breezy package) and alsa-utils. libasound2 built and installed ok on
the 770. alsa-utils would build, but not install because of package
dependencies. So anyway, I just copied the aplay binary to the
770. So, it seems to play some wav files, but not at the correct
speed; i.e. a 44100 Hz .wav file sounds very slow on the 770. I
found a 22 KHz wav and it sounded almost right. So I'm guessing the
770 is playing at 16KHz.

Can any Nokia people comment, will we have ALSA in 2.0? I for one
would be really happy to see it.

- -- Buck
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