server3: pcie_bifurcation: Add overrides for EVT1

Handle EVT1 NIC cable incorrect bifurcation issue by overriding bifurcation
string based on board product name.

Tested: Verified on hardware.
Google-Bug-Id: 471332425
Change-Id: I294aa45b242f983d20490a73ef3e23867145e606
Signed-off-by: Tom Tung <tomtung@google.com>