core: Fix ANTARES_ENABLE_IRQS/ANTARES_DISABLE_IRSQS

Signed-off-by: Andrew Andrianov <andrew@ncrmnt.org>
lib: Ditch snprintf/xprintf headers

All target architectures have printfs anyway.

Signed-off-by: Andrew Andrianov <andrew@ncrmnt.org>
avr: Properly decide whether to use rjmp or jmp in startup

Signed-off-by: Andrew Andrianov <andrew@ncrmnt.org>
printk: rename log to do_log avoid clash with math.h

Signed-off-by: Andrew Andrianov <andrew@ncrmnt.org>
lib: Implement panic, BUG_ON and assert with tracing

Signed-off-by: Andrew Andrianov <andrew@ncrmnt.org>