Enable UART3 on TX28

[Lothar Waßmann]

+	/* UART3 */
+	MX28_PAD_AUART3_RX__AUART3_RX,
+	MX28_PAD_AUART3_TX__AUART3_TX,
+	MX28_PAD_AUART3_RTS__AUART3_RTS,
+	MX28_PAD_AUART3_CTS__AUART3_CTS,
+
 	/* CAN */
 	MX28_PAD_GPMI_RDY2__CAN0_TX,
 	MX28_PAD_GPMI_RDY3__CAN0_RX,
@@ -322,6 +328,7 @@
 
 	mx28_add_duart(); /* UART1 */
 	mx28_add_auart(1); /* UART2 */
+	mx28_add_auart(3); /* UART3 */
 
 	tx28_add_fec0();
 	/* spi via ssp will be added when available */
@@ -343,6 +350,7 @@
 
 	mx28_add_duart(); /* UART1 */
 	mx28_add_auart(1); /* UART2 */
+	mx28_add_auart(3); /* UART3 */
 
 	tx28_add_fec0();
 	/* spi via ssp will be added later */