MX35: mx35pdk: wrong board revision

The board revision is detected accessing to the pmic,
that is not available before relocation (I2C).
This generates the following error:

CPU:   Freescale i.MX35 rev 2.0 at 532 MHz.
Reset cause: WDOG
<reg num> = 7 is invalid. Should be less than 0
Board: MX35 PDK 1.0

The revision number is wrong, as a default value is printed
(tested on a mx35pdk Rev. 2.0).

Move the output in the board_late_init(), when
pmic can be accessed.

Signed-off-by: Stefano Babic <sbabic@denx.de>