h5400 buzzer driver missing ioctl header

Looks like I forgot to add the ioctl header for the buzzer driver of the
h5400 platform. This patch should rectify this issue. It adds buzzer.h
to kernel26/include/linux.

Please apply.

Thanks

E

-- 
Erik Hovland
mail: erik AT hovland DOT org
web: http://hovland.org/
PGP/GPG public key available on request