driver/nand: Add support of 16K SRAM for IFC 2.0

Internal SRAM has been incresed from 8KB to 16KB for IFC cotroller ver 2.0.

Update the page offset calculation logic to support the same.

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c
index 280e14e..8b453cb 100644
--- a/drivers/mtd/nand/fsl_ifc_nand.c
+++ b/drivers/mtd/nand/fsl_ifc_nand.c
@@ -23,7 +23,6 @@
 #define CONFIG_SYS_FSL_IFC_BANK_COUNT	4
 #endif
 
-#define FSL_IFC_V1_1_0	0x01010000
 #define MAX_BANKS	CONFIG_SYS_FSL_IFC_BANK_COUNT
 #define ERR_BYTE	0xFF /* Value returned for read bytes
 				when read failed */
@@ -1040,6 +1039,9 @@
 	if (ret)
 		return ret;
 
+	if (ver >= FSL_IFC_V2_0_0)
+		priv->bufnum_mask = (priv->bufnum_mask * 2) + 1;
+
 	ret = nand_scan_ident(mtd, 1, NULL);
 	if (ret)
 		return ret;