ARM: dts: socfpga: Fix NAND controller node compatible

The compatible string for the Denali NAND controller is incorrect,
fix it by replacing it with one matching the DT bindings and the
driver.

Cc: stable@vger.kernel.org
Signed-off-by: Marek Vasut <marex@denx.de>
Fixes: d837a80d ("ARM: dts: socfpga: add nand controller nodes")
Cc: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>

arch/arm/boot/dts/socfpga.dtsi

@@ -748,7 +748,7 @@ mmc: dwmmc0@ff704000 {
 		nand0: nand@ff900000 {
 			#address-cells = <0x1>;
 			#size-cells = <0x1>;
-			compatible = "denali,denali-nand-dt";
+			compatible = "altr,socfpga-denali-nand";
 			reg = <0xff900000 0x100000>,
 			      <0xffb80000 0x10000>;
 			reg-names = "nand_data", "denali_reg";