Add ability to use custom pins in lisp

[TechAUmNu]

To use, add defines in hw config // Lisp custom pins

define PIN_HW_1_GPIO GPIOC

define PIN_HW_1 13

define PIN_HW_2_GPIO GPIOB

define PIN_HW_2 2

Ideally this would be expandable to more than 2 pins.