pcu: SNS: TC_sns_so_bvc_reset_unknown_bvci: use g_handle_rx_alive

The g_handle_rx_alive allows ignoring any ALIVE PDUs when
using f_exp_ns().
This improves the stability as the ALIVE and BVC-RESET
can come in any order.

Change-Id: I3b4ab4093b3e5bee7e32fdf6c1de3f692b13a35f
1 file changed