ARM: dt: tegra: gpio comment cleanup

Ensure that all Tegraa GPIO specifiers contain a comment indicating which
GPIO name the number refers to.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Olof Johansson <olof@lixom.net>
diff --git a/arch/arm/boot/dts/tegra-trimslice.dts b/arch/arm/boot/dts/tegra-trimslice.dts
index 4436b42..eebcf50 100644
--- a/arch/arm/boot/dts/tegra-trimslice.dts
+++ b/arch/arm/boot/dts/tegra-trimslice.dts
@@ -305,8 +305,8 @@
 	};
 
 	sdhci@c8000600 {
-		cd-gpios = <&gpio 121 0>;
-		wp-gpios = <&gpio 122 0>;
+		cd-gpios = <&gpio 121 0>; /* gpio PP1 */
+		wp-gpios = <&gpio 122 0>; /* gpio PP2 */
 	};
 
 	usb@c5004000 {