sunxi: nand: Increase CONFIG_SYS_NAND_MAX_ECCPOS value

On some sunxi boards we have NANDs exposing 1664 OOB bytes per page.
Define the CONFIG_SYS_NAND_MAX_ECCPOS value accordingly.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
diff --git a/include/configs/sunxi-common.h b/include/configs/sunxi-common.h
index f551926..b9aa62b 100644
--- a/include/configs/sunxi-common.h
+++ b/include/configs/sunxi-common.h
@@ -134,6 +134,7 @@
 #define CONFIG_SERIAL_TAG
 
 #ifdef CONFIG_NAND_SUNXI
+#define CONFIG_SYS_NAND_MAX_ECCPOS 1664
 #define CONFIG_SPL_NAND_SUPPORT 1
 #define CONFIG_SYS_NAND_ONFI_DETECTION
 #define CONFIG_SYS_MAX_NAND_DEVICE 8