Please cherry-pick "tty/serial: Add explicit PORT_TEGRA type" to devicetree/test

[Stephen Warren]

Grant, could you please cherry-pick, or otherwise pick up:

git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6.git
4539c24fe4f92c09ee668ef959d3e8180df619b9
tty/serial: Add explicit PORT_TEGRA type
(from the tty-next branch)

Into your devicetree/test branch. With that in place, I'll be able to
fix up the of_serial.c registration for nvidia,tegra250-uart to use
PORT_TEGRA instead of PORT_XSCALE, as we discussed earlier.

Thanks!

-- 
nvpublic