m68k: Return -ENODEV if no device is found

According to the tests in do_initcalls(), the proper error code in case no
device is found is -ENODEV, not -ENXIO or -EIO.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/block/ataflop.c

@@ -1880,11 +1880,11 @@ static int __init atari_floppy_init (void)
 
 	if (!MACH_IS_ATARI)
 		/* Amiga, Mac, ... don't have Atari-compatible floppy :-) */
-		return -ENXIO;
+		return -ENODEV;
 
 	if (MACH_IS_HADES)
 		/* Hades doesn't have Atari-compatible floppy */
-		return -ENXIO;
+		return -ENODEV;
 
 	if (register_blkdev(FLOPPY_MAJOR,"fd"))
 		return -EBUSY;

drivers/char/nvram.c

@@ -444,7 +444,7 @@ nvram_init(void)
 
 	/* First test whether the driver should init at all */
 	if (!CHECK_DRIVER_INIT())
-		return -ENXIO;
+		return -ENODEV;
 
 	ret = misc_register(&nvram_dev);
 	if (ret) {

drivers/input/keyboard/atakbd.c

@@ -220,7 +220,7 @@ static int __init atakbd_init(void)
 	int i, error;
 
 	if (!MACH_IS_ATARI || !ATARIHW_PRESENT(ST_MFP))
-		return -EIO;
+		return -ENODEV;
 
 	// need to init core driver if not already done so
 	if (atari_keyb_init())

drivers/video/atafb.c

@@ -3110,7 +3110,7 @@ int __init atafb_init(void)
 	printk("atafb_init: start\n");
 
 	if (!MACH_IS_ATARI)
-		return -ENXIO;
+		return -ENODEV;
 
 	do {
 #ifdef ATAFB_EXT