nimble/transport/cmac: Fix configuration
Default values always to both non-extadv and extadv builds, the only
difference is event buffer size.
# under the License.
#
-syscfg.vals.'!BLE_HCI_BRIDGE && !(BLE_EXT_ADV || BLE_LL_CFG_FEAT_LL_EXT_ADV)':
+syscfg.vals.'!BLE_HCI_BRIDGE:
BLE_HCI_EVT_HI_BUF_COUNT: 2
BLE_HCI_EVT_LO_BUF_COUNT: 8
BLE_HCI_EVT_BUF_SIZE: 70
