staging: comedi: addi_apci_3501: remove use of comedi_error()

The comedi_error() function is just a wrapper around dev_err() that adds
the dev->driver->driver_name prefix to the message and a terminating
new-line character. The addition of the driver_name is just added noise
and some of the users of comedi_error() add unnecessary additional new-line
characters.

Use dev_err() directly instead of comedi_error() to avoid any confusion
and so that all the comedi generated kernel messages have the same format.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/addi_apci_3501.c

@@ -274,7 +274,7 @@ static irqreturn_t apci3501_interrupt(int irq, void *d)
 
 	ui_Timer_AOWatchdog = inl(dev->iobase + APCI3501_TIMER_IRQ_REG) & 0x1;
 	if ((!ui_Timer_AOWatchdog)) {
-		comedi_error(dev, "IRQ from unknown source");
+		dev_err(dev->class_dev, "IRQ from unknown source\n");
 		return IRQ_NONE;
 	}