mtd: hisilicon: add a new NAND controller driver for hisilicon hip04 Soc

This patch adds the support for hisilicon 504 NAND controller which is now used
by Hisilicon Soc Hip04.

Signed-off-by: Zhou Wang <wangzhou1@hisilicon.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index bd38f21..582bbd05 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -51,5 +51,6 @@
 obj-$(CONFIG_MTD_NAND_XWAY)		+= xway_nand.o
 obj-$(CONFIG_MTD_NAND_BCM47XXNFLASH)	+= bcm47xxnflash/
 obj-$(CONFIG_MTD_NAND_SUNXI)		+= sunxi_nand.o
+obj-$(CONFIG_MTD_NAND_HISI504)	        += hisi504_nand.o
 
 nand-objs := nand_base.o nand_bbt.o nand_timings.o