OpTestEM: Fix range of frequencies to verify in performance governor.
OpTestEM: Fix range of frequencies to verify in performance governor.

When we set CPU governor to performance, we need to verify CPU frequency
against a list of frequencies which starts from turbo and ends with ultra-turbo
when WoF is enabled otherwise verify wih just turbo frequency.

Signed-off-by: Pridhiviraj Paidipeddi <fd8ea14509c256cbd04eaa4ee745a213945e70a1@linux.vnet.ibm.com>

open-power/op-test-framework,open-power/op-test-framework,open-power/op-test-framework