staging: bcm2835-audio: Remove whitespace before quoted newline

Fixes checkpatch warning "unnecessary whitespace before a quoted
newline".

Signed-off-by: Simon Sandström <simon@nikanor.nu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/bcm2835-audio/bcm2835.c

@@ -139,7 +139,7 @@ static int snd_bcm2835_alsa_probe_dt(struct platform_device *pdev)
 
 	err = snd_card_register(card);
 	if (err) {
-		dev_err(dev, "Failed to register bcm2835 ALSA card \n");
+		dev_err(dev, "Failed to register bcm2835 ALSA card\n");
 		goto err_free;
 	}