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/meesc.h b/include/configs/meesc.h
index 91f6e2f..86ce5f2 100644
--- a/include/configs/meesc.h
+++ b/include/configs/meesc.h
@@ -143,8 +143,8 @@
 # define CONFIG_SYS_NAND_DBW_8
 # 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, 15
-# define CONFIG_SYS_NAND_READY_PIN		AT91_PIO_PORTA, 22
+# define CONFIG_SYS_NAND_ENABLE_PIN		GPIO_PIN_PD(15)
+# define CONFIG_SYS_NAND_READY_PIN		GPIO_PIN_PA(22)
 #endif
 
 /* Ethernet */