drivers: pwm: pwm_nrf5_sw: Use runtime resources allocation

Use nrfx_gpiote and nrfx_ppi allocators to allocate channels
at runtime instead of fixed, device-tree based allocation which
is harder to maintain.

Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
15 files changed