at91: Fix to enable using Teridian MII phy (78Q21x3) with at91sam9260

On the at91sam9260ep development board there is an EEPROM
connected to the TWI interface (PA23, PA24 Peripheral A
multiplexing), so we cannot use these pins as ETX2, ETX3.
This patch configures PA10, PA11 pins for ETX2, ETX3
instead of PA23, PA24 pins.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Manuel Sahm <Manuel.Sahm@feig.de>

board/atmel/at91sam9260ek/at91sam9260ek.c

@@ -188,8 +188,17 @@ static void at91sam9260ek_macb_hw_init(void)
 	at91_set_B_periph(AT91_PIN_PA25, 0);	/* ERX2 */
 	at91_set_B_periph(AT91_PIN_PA26, 0);	/* ERX3 */
 	at91_set_B_periph(AT91_PIN_PA27, 0);	/* ERXCK */
+#if defined(CONFIG_AT91SAM9260EK)
+	/*
+	 * use PA10, PA11 for ETX2, ETX3.
+	 * PA23 and PA24 are for TWI EEPROM
+	 */
+	at91_set_B_periph(AT91_PIN_PA10, 0);	/* ETX2 */
+	at91_set_B_periph(AT91_PIN_PA11, 0);	/* ETX3 */
+#else
 	at91_set_B_periph(AT91_PIN_PA23, 0);	/* ETX2 */
 	at91_set_B_periph(AT91_PIN_PA24, 0);	/* ETX3 */
+#endif
 	at91_set_B_periph(AT91_PIN_PA22, 0);	/* ETXER */
 #endif