panic() cleanup.

this change
   - makes panic() variadic, doing full printf() formatting -
     no more NO_NUM, and no more separate printf() statements
     needed to print extra info (or something in hex) before panicing
   - unifies panic() - same panic() name and usage for everyone -
     vm, kernel and rest have different names/syntax currently
     in order to implement their own luxuries, but no longer
   - throws out the 1st argument, to make source less noisy.
     the panic() in syslib retrieves the server name from the kernel
     so it should be clear enough who is panicing; e.g.
         panic("sigaction failed: %d", errno);
     looks like:
         at_wini(73130): panic: sigaction failed: 0
         syslib:panic.c: stacktrace: 0x74dc 0x2025 0x100a
   - throws out report() - printf() is more convenient and powerful
   - harmonizes/fixes the use of panic() - there were a few places
     that used printf-style formatting (didn't work) and newlines
     (messes up the formatting) in panic()
   - throws out a few per-server panic() functions
   - cleans up a tie-in of tty with panic()

merging printf() and panic() statements to be done incrementally.

drivers/amddev/amddev.c

@@ -78,7 +78,7 @@ int main(void)
 
 		r= sef_receive(ANY, &m);
 		if (r != OK)
-			panic(__FILE__, "sef_receive failed", r);
+			panic("sef_receive failed: %d", r);
 		if (is_notify(m.m_type)) {
 			if (_ENDPOINT_P(m.m_source) == PM_PROC_NR) {
 				do_pm_notify(&m);
@@ -247,7 +247,7 @@ static void init_domain(int index)
 	size= 0x100000 / 8;
 	table= alloc_contig(size, AC_ALIGN4K, &busaddr);
 	if (table == NULL)
-		panic("AMDDEV","malloc failed", NO_NUM);
+		panic("malloc failed");
 	if (index == 0)
 	{
 		memset(table, 0, size);