C8051F support in vsprog

Information:
    Vsprog can support C8051F in JTAG/C2 interfaces.
    Auto-detect feature is supported on C8051F.
    Supported target area: flash('f').

Vsprog options:
    -sc8051f, refer to -s option.
    -c, refer to -c option.
    -m, refer to -m option. Supported modes:
        j: JTAG mode, default
        c: C2 mode
    -F, refer to -F option. This option is used to define frequency of JTAG, default value is 4500, unit: kHz.