Bluetooth: controller: Refactoring nRF5 radio driver

This commit refactors the nRF5 radio driver of Bluetooth controller
to use symbolic names for PPIs. It also revisits the Radio hardware
timing constants to align with experimental measurements.

Signed-off-by: Ioannis Glaropoulos <[email protected]>

Author: ioannisg

subsys/bluetooth/controller/CMakeLists.txt

@@ -7,7 +7,7 @@ zephyr_library_sources(
   hal/nrf5/cntr.c
   hal/nrf5/rand.c
   hal/nrf5/ecb.c
-  hal/nrf5/radio.c
+  hal/nrf5/radio/radio.c
   ticker/ticker.c
   ll_sw/ctrl.c
   ll_sw/crypto.c