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 header file defines the loop-count timeout value that should
 * be passed to the rx_sim_byte() function.  By the spec we have to wait
 * 9600 etu's; at 3.25 MHz SIM clock and the default slow mode (no speed
 * enhancement) this 9600 etu number translates to about 1.10 s.
 *
 * The constant defined here has been calibrated empirically; the measured
 * timeout is about 1.38 s, giving us reasonable safety margin.
 */

#define	SIM_WAIT_TIMEOUT	6000000