Updated uart driver for s3c2410

[Andrew Turner]

I've updated the uart driver for s3c2410 devices [1]. The current
version of the driver in perforce doesn't currently build. This patch
fixes this and updates the driver to remove the unneeded s3c2410_poll
and adds the rxready function.

Andrew

[1] http://fubar.geek.nz/files/freebsd/neo1973/uart_s3c2xx0.diff

-- 
Andrew Turner
http://fubar.geek.nz/blog/