imx: add support for board revision and imx_cpu_ver()

Change copied directly from commit:

  c3c5711 ENGR00141217-2 include file upgrade to 2.6.38

Signed-off-by: Richard Zhao <richard.zhao@linaro.org>
Signed-off-by: Eric Miao <eric.miao@linaro.org>
1 file changed