Power: Get rid of unused checkFpEnableFault.
Power: Get rid of unused checkFpEnableFault.

This function was brought in from another ISA and doesn't actually do anything
or get used.

andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin