ARM: dts: imx6qdl-ts7970: Fix ngpio typo and count

Device-tree incorrectly used "ngpio" which caused the driver to
fallback to 32 ngpios.

This platform has 62 GPIO registers.

Fixes: 9ff8e9fc ("ARM: dts: TS-7970: add basic device tree")
Signed-off-by: Kris Bahnsen <kris@embeddedTS.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6qdl-ts7970.dtsi

@@ -226,7 +226,7 @@ gpio8: gpio@28 {
 		reg = <0x28>;
 		#gpio-cells = <2>;
 		gpio-controller;
-		ngpio = <32>;
+		ngpios = <62>;
 	};
 
 	sgtl5000: codec@a {