kvm/emulate: Fix SETcc emulation for ENDBR

Companion patch for commit fe83f5ea

 ("kvm/emulate: Fix SETcc
emulation function offsets with SLS"), now extending it to cover the
additional ENDBR instruction.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/YjMVpfe%2f9ldmWX8W@hirez.programming.kicks-ass.net