ARM: mvebu: use improved armada spi device tree compatible name

Switch the Armada SoC SPI port device tree binding to use the new improved
armada-370-spi compatible name. This allows for a wider range of baud rates
to be used.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Reviewed-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Link: https://lkml.kernel.org/r/1410147029-30067-1-git-send-email-gerg@uclinux.org


Signed-off-by: Jason Cooper <jason@lakedaemon.net>