Add multi-arch GPIO abstraction and setup LED lib

Signed-off-by: Nikita 'webconn' Maslov <wkernelteam@gmail.com>
stepper_u4: reconfigure

Signed-off-by: Nikita 'webconn' Maslov <wkernelteam@gmail.com>
Add gitignore

Signed-off-by: Nikita 'webconn' Maslov <wkernelteam@gmail.com>
Remove legacy files

Signed-off-by: Nikita 'webconn' Maslov <wkernelteam@gmail.com>
Remove extra legacy files

Signed-off-by: Nikita 'webconn' Maslov <wkernelteam@gmail.com>
include: remove helpers

Signed-off-by: Nikita 'webconn' Maslov <wkernelteam@gmail.com>
Rework GPIO and add Stepper driver (alpha)

Signed-off-by: Nikita 'webconn' Maslov <wkernelteam@gmail.com>
chassis: Inplement Stepper Chassis API

Signed-off-by: Nikita 'webconn' Maslov <wkernelteam@gmail.com>
avr: gpio: Implement GPIO_TOGGLE()

Signed-off-by: Nikita 'webconn' Maslov <wkernelteam@gmail.com>
stepper: Proof-of-concept

Signed-off-by: Nikita 'webconn' Maslov <wkernelteam@gmail.com>
Remove some files

Signed-off-by: Nikita 'webconn' Maslov <wkernelteam@gmail.com>
gitignore: Add tags file in ignore list

Signed-off-by: Nikita 'webconn' Maslov <wkernelteam@gmail.com>
Update README.md
env: Add printk dependency in kcnf

Signed-off-by: Nikita 'webconn' Maslov <wkernelteam@gmail.com>
bootstrap: Some decorations

Signed-off-by: Nikita 'webconn' Maslov <wkernelteam@gmail.com>
stepper: Add Antares startup support

Signed-off-by: Nikita 'webconn' Maslov <wkernelteam@gmail.com>
Merge with README
doc: Start documenting

Signed-off-by: Nikita 'webconn' Maslov <wkernelteam@gmail.com>
stepper: Import GPIO params from Makefile

Signed-off-by: Nikita 'webconn' Maslov <wkernelteam@gmail.com>