ltp: require CKI syscall tests to pass

Syscalls that are part of the common kernel interface must be present.
Do not allow tests for these syscalls to be skipped with TCONF.

There are a few CKI syscall tests which are currently being skipped. Do
not require these until they can be fixed.

Bug: 111764751
Test: run vts-kernel -m VtsKernelLtp
Change-Id: Ie01a583fcb9de760f48adf258eb6bb8cd7469ee7
1 file changed