gps remaster

[CullenSharp]

• Refactor: Update dts to use gpiod
  • Split up pinmux for ma2771 and skytraq.
  • Add informative comments

[CullenSharp]

The gpio controllers probe in a different order from what's in the device tree. I could try to add a set of dts aliases to force the dts to refer to the way that gpio controllers are probed.

see https://www.spinics.net/lists/devicetree/msg134171.html, which contains the following example:

+Example of a machine having 4 GPIO banks.
+
+	/ {
+		aliases {
+			...
+			gpio0 = &gpio1;
+			gpio1 = &gpio2;
+			gpio2 = &gpio3;
+			gpio3 = &gpio4;
+		};
+	};
+

I found this forum thread a helpful aggregator of information about this: https://forum.beagleboard.org/t/wrong-order-of-gpiochip0-3/33852/4

[ThirteenFish]

I dug into the aliasing a bit and I came up with the same answer, you can see in am33xx.dtsi in the beagleboard devicetrees the aliases for all the other peripheries too. Putting the gpio aliases in oresat-base.dtsi seems like the right place for it.