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.

# This loadtool init script provides memory interface register setup
# for targets which fit the following criteria:
#
# 3 chip selects are used: nCS0, nCS1 and nCS2
# 4 wait states are to be used (register setting 00A4)
# 8 MiB memory banks are in use, such that ADD22 needs to be enabled

w16 fffffb00 00A4
w16 fffffb02 00A4
w16 fffffb04 00A4
w16 fffef006 0008