test/power: skip KVM autotest if cannot run
test/power: skip KVM autotest if cannot run

power_kvm_vm_autotest should run on kvm vm and
virtio-ports should exist, if not test should skip.
Hence changed return as TEST_SKIPPED.

Fixes: 0ea2dd4409 ("test: skip when required lib not available")
Cc: stable@dpdk.org

Signed-off-by: Pallantla Poornima <756fdb0861efad85838173e0a29ad4c7efdfe95b@intel.com>
Acked-by: Reshma Pattan <4d9eb35579760ed1c2db754a6b402039c9c8a1cb@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk