wandboard: Do not print error when PMIC is not present

On wandboard variants prior to revD1, there is no PMIC populated, so
do not print an error when the reading of the device ID register fails.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Tested-by: Heiko Schocher <hs@denx.de>
1 file changed