lantiq: backport kernel patch to pass of node to nand_dt_init

Backport upstream commit a61ae81a1907af1987ad4c77300508327bc48b23.

The actually purpose of the patch was to do some cleanup. As a side
effect of this cleanup, the device node is now passed to nand_dt_init.

This allows to use the common nand device tree properties

 - nand-bus-width
 - nand-on-flash-bbt
 - nand-ecc-mode
 - nand-ecc-step-size
 - nand-ecc-strength

for the plat_nand driver.

Signed-off-by: Mathias Kresin <dev@kresin.me>

target/linux/lantiq/dts/BTHOMEHUBV5A.dts

@@ -207,8 +207,6 @@
 		reg = <0x7000 0 0 0 0>;
 		qca,no-eeprom; /* load from ath9k-eeprom-pci-0000:00:0e.0.bin */
 		qca,disable-5ghz;
-		mtd-mac-address = <&caldata 0x110c>;
-		mtd-mac-address-increment = <2>;
 	};
 };
 

target/linux/lantiq/patches-4.4/0047-mtd-plat-nand-pass-of-node.patch

@@ -0,0 +1,27 @@
+--- a/drivers/mtd/nand/plat_nand.c
++++ b/drivers/mtd/nand/plat_nand.c
+@@ -31,6 +31,7 @@ static int plat_nand_probe(struct platfo
+ {
+ 	struct platform_nand_data *pdata = dev_get_platdata(&pdev->dev);
+ 	struct mtd_part_parser_data ppdata;
++	struct device_node *np = pdev->dev.of_node;
+ 	struct plat_nand_data *data;
+ 	struct resource *res;
+ 	const char **part_types;
+@@ -58,6 +59,7 @@ static int plat_nand_probe(struct platfo
+ 		return PTR_ERR(data->io_base);
+ 
+ 	data->chip.priv = &data;
++	data->chip.flash_node = np;
+ 	data->mtd.priv = &data->chip;
+ 	data->mtd.dev.parent = &pdev->dev;
+ 
+@@ -105,7 +107,7 @@ static int plat_nand_probe(struct platfo
+ 
+ 	part_types = pdata->chip.part_probe_types;
+ 
+-	ppdata.of_node = pdev->dev.of_node;
++	ppdata.of_node = np;
+ 	err = mtd_device_parse_register(&data->mtd, part_types, &ppdata,
+ 					pdata->chip.partitions,
+ 					pdata->chip.nr_partitions);