syslog: print the server address with print_ip()

The status line built the dotted quad by hand, which is what
print_ip() from cmd_parser.c already does. Reusing it drops seven
calls to one and takes 48 bytes off BANK2.

The prototype is not __banked because cmd_parser.c and syslog.c are
both in BANK2; a plain call is what the compiler needs here. Should
either file move to another bank, this has to become __banked with it.

cmd_parser.h

@@ -13,6 +13,7 @@ void cmd_tokenize(void) __banked;
 void cmd_parser(void) __banked;
 void execute_config(void) __banked;
 void execute_commands(__xdata uint8_t *p) __banked;
+void print_ip(__xdata uint8_t *ptr);
 void print_sw_version(void) __banked;
 void clear_command_history(void) __banked;