mtd: nand: sunxi: fix support for 512bytes ECC chunks

The driver is incorrectly assuming that the ECC block size is always 1k
which is not always true.

Also take the other cases into account.
Signed-off-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>

drivers/mtd/nand/sunxi_nand.c

@@ -145,6 +145,7 @@
 #define NFC_ECC_PIPELINE	BIT(3)
 #define NFC_ECC_EXCEPTION	BIT(4)
 #define NFC_ECC_BLOCK_SIZE_MSK	BIT(5)
+#define NFC_ECC_BLOCK_512	BIT(5)
 #define NFC_RANDOM_EN		BIT(9)
 #define NFC_RANDOM_DIRECTION	BIT(10)
 #define NFC_ECC_MODE_MSK	GENMASK(15, 12)
@@ -817,6 +818,9 @@ static void sunxi_nfc_hw_ecc_enable(struct mtd_info *mtd)
 	ecc_ctl |= NFC_ECC_EN | NFC_ECC_MODE(data->mode) | NFC_ECC_EXCEPTION |
 		   NFC_ECC_PIPELINE;
 
+	if (nand->ecc.size == 512)
+		ecc_ctl |= NFC_ECC_BLOCK_512;
+
 	writel(ecc_ctl, nfc->regs + NFC_REG_ECC_CTL);
 }