Bluetooth: Controller: nRF54Lx: Use nrfx interface for bsim use (4/4)

Use nrfx interface for register access with sideeffects to
facilitate bsim use.

Remove CMSIS interface use, was replaced with nrf_grtc,
nrf_dppic and nrf_ppib interface in previous commit.

4 part commits:
1. Add nrf_grtc interface.
2. Remove CMSIS interface use.
3. Add nrf_grtc interface, once missing bsim port available.
4. Remove CMSIS interface use, replaced by bsim port.

Signed-off-by: Vinayak Kariappa Chettimada <[email protected]>

Author: cvinayak

subsys/bluetooth/controller/ll_sw/nordic/hal/nrf5/radio/radio_nrf5_dppi.h

@@ -102,30 +102,18 @@ static inline void hal_event_timer_start_ppi_config(void)
 {
 #if defined(CONFIG_BT_CTLR_NRF_GRTC)
 	/* Publish GRTC compare */
-	NRF_GRTC->PUBLISH_COMPARE[HAL_CNTR_GRTC_CC_IDX_RADIO] =
-		((HAL_EVENT_TIMER_START_PPI <<
-		  GRTC_PUBLISH_COMPARE_CHIDX_Pos) &
-		 GRTC_PUBLISH_COMPARE_CHIDX_Msk) |
-		((GRTC_PUBLISH_COMPARE_EN_Enabled <<
-		  GRTC_PUBLISH_COMPARE_EN_Pos) &
-		 GRTC_PUBLISH_COMPARE_EN_Msk);
 	nrf_grtc_publish_set(NRF_GRTC, HAL_CNTR_GRTC_EVENT_COMPARE_RADIO,
 			     HAL_EVENT_TIMER_START_PPI);
 
 	/* Enable same DPPI in Global domain */
-	NRF_DPPIC20->CHENSET = BIT(HAL_EVENT_TIMER_START_PPI);
 	nrf_dppi_channels_enable(NRF_DPPIC20,
 				 BIT(HAL_EVENT_TIMER_START_PPI));
 
 	/* Setup PPIB send subscribe */
-	NRF_PPIB21->SUBSCRIBE_SEND[HAL_EVENT_TIMER_START_PPI] =
-		BIT(HAL_EVENT_TIMER_START_PPI) | PPIB_SUBSCRIBE_SEND_EN_Msk;
 	nrf_ppib_subscribe_set(NRF_PPIB21, HAL_PPIB_SEND_EVENT_TIMER_START_PPI,
 			       HAL_EVENT_TIMER_START_PPI);
 
 	/* Setup PPIB receive publish */
-	NRF_PPIB11->PUBLISH_RECEIVE[HAL_EVENT_TIMER_START_PPI] =
-		BIT(HAL_EVENT_TIMER_START_PPI) | PPIB_PUBLISH_RECEIVE_EN_Msk;
 	nrf_ppib_publish_set(NRF_PPIB11, HAL_PPIB_RECEIVE_EVENT_TIMER_START_PPI,
 			     HAL_EVENT_TIMER_START_PPI);