Modify VPD fetchData() call to allow for reading from actual HW
Modify VPD fetchData() call to allow for reading from actual HW

  - On an OpenPower system VPD can come from either the cache
    (in PNOR) or off of the real HW system.
  - Previously the option was just to read from the cache which
    wasn't always present

Change-Id: I2a0997ac7b594b10b3760399c8700e1bcc56e54b
CQ: SW442212
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/64702
Reviewed-by: Richard Ward <aeda7961d20349f627d46e96d7eb80090e03ed5a@us.ibm.com>
Tested-by: Jenkins Server <8e3f934e4c44875bc48d33da3ea13d93ba9a233f@us.ibm.com>
Tested-by: Jenkins OP Build CI <e610bd72261d3c0a48f1e8ae36832ab00774d426@us.ibm.com>
Tested-by: Jenkins OP HW <0eb0fff262f74a65a832afbcc7b153e391c9a3fd@us.ibm.com>
Reviewed-by: Prachi Gupta <25a72946fc4ec2539bba3cff1fbb2916af6a7649@us.ibm.com>
Tested-by: FSP CI Jenkins <aa9e4d9ac7cd25905e9c0dd36d4150516e73dd86@us.ibm.com>
Reviewed-by: Daniel M. Crowell <912029ca9254ac7b5854e56910561d682e1fa2d0@us.ibm.com>

open-power/hostboot,open-power/hostboot,open-power/hostboot,open-power/hostboot,open-power/hostboot