[PATCH] atyfb: Fix power management

The new atyfb has the return value for the Power Management routine
wrong. This prevents sleep from working on PowerBooks with mach64
video chips. This fixes it.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/video/aty/atyfb_base.c

@@ -2015,7 +2015,7 @@ static int aty_power_mgmt(int sleep, struct atyfb_par *par)
 	}
 	mdelay(500);
 
-	return timeout ? -1 : 0;
+	return timeout ? 0 : -EIO;
 }
 
 static int atyfb_pci_suspend(struct pci_dev *pdev, u32 state)