Use a smaller range of test registers in MFP mode as there are fewer
resources than when in SFP mode.

Change-Id: I08424890c3f57b5dde5ee99e99724ce252e0875a
Signed-off-by: NKamil Krawczyk <kamil.krawczyk@intel.com>
Signed-off-by: NShannon Nelson <shannon.nelson@intel.com>
Tested-by: NKavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>