sunxi_nand_spl: Do not bother writing the spare-area reg in syndrome mode

In syndrome mode we set the NFC_SEQ bit in the command register, so the
spare-area register is not used. Also the value currently being written is
actual wrong, the ecc sits at "column + CONFIG_NAND_SUNXI_SPL_ECC_PAGE_SIZE"
not just CONFIG_NAND_SUNXI_SPL_ECC_PAGE_SIZE.

So the current code only serves to confuse the user -> remove it.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>

drivers/mtd/nand/sunxi_nand_spl.c

@@ -256,10 +256,7 @@ static void nand_read_page(unsigned int real_addr, dma_addr_t dst,
 	val = readl(SUNXI_NFC_BASE + NFC_CTL);
 	writel(val | NFC_CTL_RAM_METHOD, SUNXI_NFC_BASE + NFC_CTL);
 
-	if (syndrome) {
-		writel(CONFIG_NAND_SUNXI_SPL_ECC_PAGE_SIZE,
-		       SUNXI_NFC_BASE + NFC_SPARE_AREA);
-	} else {
+	if (!syndrome) {
 		oob_offset = CONFIG_NAND_SUNXI_SPL_PAGE_SIZE
 			+ (column / CONFIG_NAND_SUNXI_SPL_ECC_PAGE_SIZE)
 			* ecc_off;