Currently packing configuration is done for 8bits per transfer word as default as part of baud rate change. Extend packing configuration when there is a request for 5bits/6bits/7bits per transfer word from set_termios. Change-Id: I01341c94eef3b3697db3fce7846042cbe9e9f2af Signed-off-by: Visweswara Tanuku <quic_vtanuku@quicinc.com>