[media] bdisp: remove needless check

As reported by smatch:
	drivers/media/platform/sti/bdisp/bdisp-v4l2.c:947 bdisp_s_selection() warn: unsigned 'out.width' is never less than zero.
	drivers/media/platform/sti/bdisp/bdisp-v4l2.c:947 bdisp_s_selection() warn: unsigned 'out.height' is never less than zero.
Indeed, width and height are unsigned.
Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/platform/sti/bdisp/bdisp-v4l2.c

@@ -944,8 +944,7 @@ static int bdisp_s_selection(struct file *file, void *fh,
 	out.width = ALIGN(in->width, frame->fmt->w_align);
 	out.height = ALIGN(in->height, frame->fmt->w_align);
 
-	if ((out.width < 0) || (out.height < 0) ||
-	    ((out.left + out.width) > frame->width) ||
+	if (((out.left + out.width) > frame->width) ||
 	    ((out.top + out.height) > frame->height)) {
 		dev_err(ctx->bdisp_dev->dev,
 			"Invalid crop: %dx%d@(%d,%d) vs frame: %dx%d\n",