Cleanup Code, Fix Reset Button, Enable Sysupgrade

* Add more documentation to mach-mr12.c
* Remap Reset to proper GPIO of 8
* Reorganize init in mach-mr12.c
* Remap WiFi LED GPIO's to make sense
* Set Status LED to Green GPIO (No one likes the orange light)
* Set WiFi LED to W1 (Closest LED to NIC)

Signed-off-by: Chris Blake <chrisrblake93@gmail.com>