fc-shell TCH DL handler: add support for CSD modes TCH DL capture mechanism in FC Tourmaline firmware has been extended to support CSD modes in addition to speech - add the necessary support on the host tools side. It needs to be noted that this mechanism in its present state does NOT provide the debug utility value that was sought: as we learned only after the code was implemented, TI's DSP has a misfeature in that the buffer we are reading (a_dd_0[]) is zeroed out when the IDS block is enabled, i.e., we are reading all zeros and not the real DL bits we were after. But since the code has already been written, we are keeping it - perhaps we can do some tests with IDS disabled.

# Chi-Mei phones (Motorola W220, Sony Ericsson J120, likely others) have
# a single-bank flash chip on nCS0 and XRAM on nCS3 instead of the usual nCS1.
# The timings are unknown, so we set a conservative WS=4.  The flash can be
# 8 MiB, so we need to enable ADD22.

w16 fffffb00 00A4
w16 fffffb06 00A4
w16 fffef006 0008