We have been able to enable coded phy with PAWR using
```
struct bt_le_adv_param *params = BT_LE_EXT_ADV_NCONN;
params->options |= BT_LE_ADV_OPT_USE_IDENTITY | BT_LE_ADV_OPT_USE_NAME | BT_LE_ADV_OPT_CODED;
params->sid = 0;
err = bt_le_ext_adv_create(params, &adv_cb, &pawr_adv);
```
And config
```
CONFIG_BT_CTLR_PHY_CODED=y
```
This seems to be using S=8 how can we select S=2 instead