auxdisplay: charlcd: fix two-line command ^[[LN not marked as processed

Signed-off-by: Robert Abel <rabel@robertabel.eu>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>

drivers/auxdisplay/charlcd.c

@@ -363,6 +363,7 @@ static inline int handle_lcd_special_code(struct charlcd *lcd)
 		break;
 	case 'N':	/* Two Lines */
 		priv->flags |= LCD_FLAG_N;
+		processed = 1;
 		break;
 	case 'l':	/* Shift Cursor Left */
 		if (priv->addr.x > 0) {