target-utils: added 10 ms delay at the end of abb_power_off() The deosmification of the ABB access code (replacement of osmo_delay_ms() bogus delays with correctly-timed ones, which are significantly shorter) had one annoying side effect: when executing the poweroff command from any of the programs, one last '=' prompt character was being sent (and received by the x86 host) as the Calypso board powers off. With delays being shorter now, the abb_power_off() function was returning and the standalone program's main loop was printing its prompt before the Iota chip fully executed the switch-off sequence! I thought about inserting an endless tight loop at the end of the abb_power_off() function, but the implemented solution of a 10 ms delay is a little nicer IMO because if the DEVOFF operation doesn't happen for some reason in a manual hacking scenario, there won't be an artificial blocker in the form of a tight loop keeping us from further poking around.

/*
 * 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
/* FreeCalypso additions */
#define RVT_AT_HEADER        0x1A
#define RVT_EXTUI_HEADER     0x1B
#define RVT_TCH_HEADER       0x1C
#define RVT_KEEPALIVE_HEADER 0x1D