Staging: comedi: addi-data: convert printk() to dev_err()

This patch for hwdrv_apci035.c changes a printk() call to a dev_err() call
since this is generally preferred.  It also removes a newline from the start
of the error message.

Signed-off-by: Chase Southwood <chase.southwood@yahoo.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>