lib/vsprintf.c: don't special-case pointers to address null

The %p format of printf() would print a pointer to address null as
"(null)".  This makes sense in a real OS where a NULL pointer must
never be dereferenced, but this is a bootloader, and there are cases
where accessing the data at address null makes perfect sense.

Remove the special case in lib/vsprintf.c using "#if 0" with a comment
to make clear this was an intentional change and to stop re-adding
this code.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

lib/vsprintf.c

@@ -495,9 +495,15 @@ static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width,
 static char *pointer(const char *fmt, char *buf, char *end, void *ptr,
 		int field_width, int precision, int flags)
 {
+	/*
+	 * Being a boot loader, we explicitly allow pointers to
+	 * (physical) address null.
+	 */
+#if 0
 	if (!ptr)
 		return string(buf, end, "(null)", field_width, precision,
 			      flags);
+#endif
 
 #ifdef CONFIG_CMD_NET
 	switch (*fmt) {