ARM: mx28: Remove duplicate OCOTP error message

The mxs_get_ocotp() function already prints an error message in the case of
a timeout, so no need to print them again in the board files.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Marek Vasut <marek.vasut@gmail.com>
Acked-by: Stefano Babic <sbabic@denx.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>