ARM: i.MX: efikamx: match machine descriptions with legacy

  Rename machine descriptions to match legacy descriptions distributed by
  manufacturer BSP. This way distributions can do clean upgrades from
  userspace scripts which check for these values to differentiate platforms
  with single kernel binaries.

Signed-off-by: Hector Oron <hector.oron@gmail.com>
Acked-by: Matt Sealey <matt@genesi-usa.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>