at91: nand: switch atmel_nand to generic GPIO API

Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
Acked-by: Jens Scharsig (BuS Elektronik)<esw@bus-elektronik.de>
Tested-by: Jens Scharsig (BuS Elektronik)<esw@bus-elektronik.de>
Acked-by: Scott Wood <scottwood@freescale.com>
diff --git a/include/configs/at91sam9n12ek.h b/include/configs/at91sam9n12ek.h
index 4ec1799..e23549d 100644
--- a/include/configs/at91sam9n12ek.h
+++ b/include/configs/at91sam9n12ek.h
@@ -113,8 +113,8 @@
 #define CONFIG_SYS_NAND_BASE		0x40000000
 #define CONFIG_SYS_NAND_MASK_ALE	(1 << 21)
 #define CONFIG_SYS_NAND_MASK_CLE	(1 << 22)
-#define CONFIG_SYS_NAND_ENABLE_PIN	AT91_PIO_PORTD, 4
-#define CONFIG_SYS_NAND_READY_PIN	AT91_PIO_PORTD, 5
+#define CONFIG_SYS_NAND_ENABLE_PIN	GPIO_PIN_PD(4)
+#define CONFIG_SYS_NAND_READY_PIN	GPIO_PIN_PD(5)
 
 /* PMECC & PMERRLOC */
 #define CONFIG_ATMEL_NAND_HWECC