Add snippets for starting RCC for GPIO and timers

Signed-off-by: Maslov Nikita <wkernelteam@gmail.ru>
Add Servo library

Ported from PeriphBoard

Signed-off-by: Maslov Nikita <wkernelteam@gmail.ru>
Fixed sensors library (no RCC required)

Signed-off-by: Maslov Nikita <wkernelteam@gmail.ru>