staging: most: hdm-dim2: delete error code from logging message

This patch removes the logging of the returned error code of function
dim2_probe as it is done by the calling function.

Signed-off-by: Andrey Shvetsov <andrey.shvetsov@k2l.de>
Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>