mtd: nand: Update dependency of IFC for LS1021A

As NAND support for Freescale/NXP IFC controller is available on
LS1021A, the dependency for LS1021A is added.

LS1021A is an earlier product and is not compatible with later
LayerScape architecture. So ARCH_LAYERSCAPE can't cover LS1021A.
Signed-off-by: Alison Wang <alison.wang@nxp.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>

drivers/mtd/nand/Kconfig

@@ -439,7 +439,7 @@ config MTD_NAND_FSL_ELBC
 
 config MTD_NAND_FSL_IFC
 	tristate "NAND support for Freescale IFC controller"
-	depends on FSL_SOC || ARCH_LAYERSCAPE
+	depends on FSL_SOC || ARCH_LAYERSCAPE || SOC_LS1021A
 	select FSL_IFC
 	select MEMORY
 	help