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.

/*
 * Definitions for the RVT MUX over-the-wire protocol
 */

#define	STX	0x02
#define	DLE	0x10

#define RVT_RV_HEADER        0x11
#define RVT_L1_HEADER        0x12
#define RVT_L23_HEADER       0x13
#define RVT_TM_HEADER        0x14
#define RVT_RNET_HEADER      0x15
#define RVT_PROF_HEADER      0x16
#define RVT_GTTBACK_HEADER   0x17
#define RVT_OTHER_HEADER     0x18
#define RVT_INVALID_HEADER   0xFF