mpsl: cx: Skip direct GPIO access in CX on bsim platforms

bsim hardware models don't support direct peripheral address writes.
Restore the behavior for bsim to before 69749d0.

Signed-off-by: Aleksandar Stanoev <[email protected]>

Author: alexstanoev-nordic

subsys/mpsl/cx/nrf700x/mpsl_cx_nrf700x.c

@@ -65,13 +65,15 @@ static const struct gpio_dt_spec req_spec     = GPIO_DT_SPEC_GET(CX_NODE, req_gp
 static const struct gpio_dt_spec status0_spec = GPIO_DT_SPEC_GET(CX_NODE, status0_gpios);
 static const struct gpio_dt_spec grant_spec   = GPIO_DT_SPEC_GET(CX_NODE, grant_gpios);
 
+#if !defined(CONFIG_SOC_SERIES_BSIM_NRFXX)
 /* Direct register access pointers for ISR-safe GPIO control from DT */
 static NRF_GPIO_Type *req_port =
 	((NRF_GPIO_Type *)DT_REG_ADDR(DT_GPIO_CTLR(CX_NODE, req_gpios)));
 static NRF_GPIO_Type *status0_port =
 	((NRF_GPIO_Type *)DT_REG_ADDR(DT_GPIO_CTLR(CX_NODE, status0_gpios)));
 static uint32_t req_pin_mask = BIT(DT_GPIO_PIN(CX_NODE, req_gpios));
 static uint32_t status0_pin_mask = BIT(DT_GPIO_PIN(CX_NODE, status0_gpios));
+#endif
 
 static mpsl_cx_cb_t callback;
 static struct gpio_callback grant_cb;
@@ -174,6 +176,9 @@ static int sig_dir_level_calc(mpsl_cx_op_map_t ops)
  */
 static int32_t gpio_drive_status0_to_dir(mpsl_cx_op_map_t ops)
 {
+#if defined(CONFIG_SOC_SERIES_BSIM_NRFXX)
+	return gpio_pin_set_dt(&status0_spec, sig_dir_level_calc(ops));
+#else
 	if (status0_port == NULL) {
 		return -NRF_EINVAL;
 	}
@@ -186,6 +191,7 @@ static int32_t gpio_drive_status0_to_dir(mpsl_cx_op_map_t ops)
 		nrf_gpio_port_out_clear(status0_port, status0_pin_mask);
 	}
 	return 0;
+#endif
 }
 
 /**
@@ -196,6 +202,9 @@ static int32_t gpio_drive_status0_to_dir(mpsl_cx_op_map_t ops)
  */
 static int32_t gpio_drive_request(int active)
 {
+#if defined(CONFIG_SOC_SERIES_BSIM_NRFXX)
+	return gpio_pin_set_dt(&req_spec, active);
+#else
 	if (req_port == NULL) {
 		return -NRF_EINVAL;
 	}
@@ -206,6 +215,7 @@ static int32_t gpio_drive_request(int active)
 		nrf_gpio_port_out_clear(req_port, req_pin_mask);
 	}
 	return 0;
+#endif
 }
 
 static int32_t request(const mpsl_cx_request_t *req_params)