Starting with Oracle Solaris 11.2, the Oracle Hardware Management Pack packages are not available in the Oracle Hardware Management Pack (mp-re) repository. Instead, they are available in the Oracle Solaris OS repository.
Workaround: If you previously had the Oracle Hardware Management Pack installed on your Oracle Solaris system, type the following command to get the updated software before updating to Oracle Solaris 11.3:
# pkg set-publisher --non-sticky mp-re