busybox-ntpd which installed by default at linino  doesn't support advanced features like query.  We need update it to standard package of ntpd.

opkg update
opkg install ntpd
opkg install ntp-utils
/etc/init.d/sysntpd disable
/etc/init.d/ntpd enable
/etc/init.d/ntpd start
ntpq -p
    remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
+ntp2.h.vporn.co 173.13.85.5      2 u   65   64   37   57.814   -9.849   2.276
+host2.kingrst.c 208.75.88.4      3 u   61   64   37   40.626   -6.173   5.317
-services.quadra 121.130.110.69   3 u   61   64   37   81.499   -1.507   3.616
*repos.lax-noc.c 216.218.254.202  2 u   68   64   37   79.674   -2.960   3.11