pci: continued implementation in P2A bridge handler
pci: continued implementation in P2A bridge handler

Continued implementation in P2A bridge handler.  The P2A handler on
configuration read() will return this information now.  The information
is currently hard-coded as 0.

Change-Id: Iafdefcf1f354575fec6ee38c0983b3d40754f6f4
Signed-off-by: Patrick Venture <36c53fa43f47f3fd67cb2fc38031827244d18a1f@google.com>

openbmc/phosphor-ipmi-flash