ppc4xx: NAND configuration

Made NAND bank configuration setting a config variable.

Signed-off-by: Wolfgang Ocker <weo@reccoware.de>
Signed-off-by: Stefan Roese <sr@denx.de>

cpu/ppc4xx/ndfc.c

@@ -149,6 +149,10 @@ static int ndfc_verify_buf(struct mtd_info *mtdinfo, const uint8_t *buf, int len
 }
 #endif /* #ifndef CONFIG_NAND_SPL */
 
+#ifndef CFG_NAND_BCR
+#define CFG_NAND_BCR 0x80002222
+#endif
+
 void board_nand_select_device(struct nand_chip *nand, int chip)
 {
 	/*
@@ -161,7 +165,7 @@ void board_nand_select_device(struct nand_chip *nand, int chip)
 	/* Set NandFlash Core Configuration Register */
 	/* 1 col x 2 rows */
 	out_be32((u32 *)(base + NDFC_CCR), 0x00000000 | (cs << 24));
-	out_be32((u32 *)(base + NDFC_BCFG0 + (cs << 2)), 0x80002222);
+	out_be32((u32 *)(base + NDFC_BCFG0 + (cs << 2)), CFG_NAND_BCR);
 }
 
 int board_nand_init(struct nand_chip *nand)