uek-rpm: Build kernel ueknano rpm for OL7

uek-rpm: Build kernel ueknano rpm for OL7

Orabug: 27002543

This commit enables building of kernel-ueknano rpm for OL7 also. These
changes are taken from the below commits that were done for OL6.

008dae863de6 uek-rpm: Clean up installed directories when uninstalling kernel-ueknano
799da1091458 uek-rpm: Add missing ko modules to nano rpm
069411cd55c2 uek-rpm: Fix package dependencies for kernel-ueknano
566c3b2e1946 uek-rpm: Add missing .ko files to ueknano modules list
74d5ebd39bfa uek-rpm: Share specfile for both kernel-ueknano and kernel-uek

Signed-off-by: Somasundaram Krishnasamy <somasundaram.krishnasamy@oracle.com>
Reviewed-by: Todd Vierling <todd.vierling@oracle.com>
Acked-by: Ethan Zhao <ethan.zhao@oracle.com>