* cdl/can_lpc2xxx.cdl: Add CYGHWR_DEVS_CAN_LPC2XXX_BUSOFF_WORKAROUND to enable conditional Bus-Off reset mode workaround. [Bug 1001897] * src/can_lpc2xxx.c: Add function lpc2xxx_reset_error_counters to reset TX and RX error counters to certain values. Function lpc2xxx_start_module now clears both error counters. Add some LPC2XXX_DBG_PRINT statements to lpc2xxx_can_getevent function. Add function lpc2xxx_print_status to ease printing status register content. If a bus error condition occures (ICR_BUS_ERR) the function lpc2xxx_can_getevent now clears the error counters to prevent error ISR from blocking application and to support recovery from bus off condition if option CYGHWR_DEVS_CAN_LPC2XXX_BUSOFF_WORKAROUND is enabled.