FogBugz #168684: Disable NAND driver in devicetree

On our CycloneV, sometimes a NAND chip is detected even though
there isn't one on the board.  The Denali NAND driver already
has code to prevent erroneous detections, but apparently it's
not working as well as it could.  Our solution is to disable the NAND
driver by default for socfpga.

Signed-off-by: Graham Moore <[email protected]>

Author: Graham Moore

arch/arm/boot/dts/socfpga.dtsi

@@ -615,6 +615,7 @@
 			dma-mask = <0xffffffff>;
 			clocks = <&nand_clk>;
 			have-hw-ecc-fixup;
+			status = "disabled";
 
 			partition@nand-boot {
 				/* 8MB for raw data. */