kernel: enable kernel support for ALSA midi

Here is a newer version of the patch:

Enable the real ALSA midi interface (seq) in the kernel. The existing
rawmidi interface is still present. This allows for the alsa midi
utilities to work.

Signed-off-by: Adam Goode <adam@spicenitz.org>
[b_tsiligiannis: replaced $(LINUX_KMOD_SUFFIX) with .ko]
Signed-off-by: Vasilis Tsiligiannis <b_tsiligiannis@silverton.gr>

SVN-Revision: 32712