Hello Devendra Singh Baghel,
You would need to add the package classes for ipk. You may add this to the already existing PACKAGE_CLASSES variable in the local.conf file.
PACKAGE_CLASSES ?= "package_rpm package_ipk"
You would also need to add the package-management feature to the EXTRA_IMAGE_FEATURES variable.
EXTRA_IMAGE_FEATURES += " package-management"
And also the opkg recipe:
IMAGE_INSTALL_append = " opkg
These are the main packages required for OPKG. After this you would need to setup the repositories in order for OPKG to work.
I hope this helps!