simplify lcd_disable_raster()

Cc: Krzysztof Helt <krzysztof.h1@wp.pl>
Cc: Pavel Kiryukhin <pkiryukhin@ru.mvista.com>
Cc: Steve Chen <schen@mvista.com>
Cc: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

drivers/video/da8xx-fb.c

@@ -201,8 +201,6 @@ static int lcd_disable_raster(struct da8xx_fb_par *par)
 		ret = wait_event_interruptible_timeout(par->da8xx_wq,
 						!lcdc_read(LCD_STAT_REG) &
 						LCD_END_OF_FRAME0, WSI_TIMEOUT);
-		if (ret < 0)
-			return ret;
 		if (ret == 0)
 			ret = -ETIMEDOUT;
 	}