examples/vm_power: process CPU frequency query
examples/vm_power: process CPU frequency query

On query received from VM guest send CPUs frequencies.

Signed-off-by: Marcin Hajkowski <1abed0dda79f48ba314cbafa2cf9ecd115d052fe@intel.com>
Tested-by: David Hunt <763be7c8e0ad91e03160e7aed76d5cd41534e2f9@intel.com>
Acked-by: Lee Daly <2af6d60a469e2e51a74701465717d0f5d7aa31a1@intel.com>

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