nimble/ll: Fix BLE_HCI_OCF_VS_SET_DATA_LEN OCF
This was duplicating BLE_HCI_OCF_VS_CSS_ENABLE and caused assert
on register.
@@ -1168,7 +1168,7 @@ struct ble_hci_vs_css_read_conn_slot_rp {
uint16_t conn_handle;
uint16_t slot_idx;
} __attribute__((packed));
-#define BLE_HCI_OCF_VS_SET_DATA_LEN (MYNEWT_VAL(BLE_HCI_VS_OCF_OFFSET) + (0x0004))
+#define BLE_HCI_OCF_VS_SET_DATA_LEN (MYNEWT_VAL(BLE_HCI_VS_OCF_OFFSET) + (0x0008))
struct ble_hci_vs_set_data_len_cp {
uint16_t conn_handle;
uint16_t tx_octets;
