fix BASE_PCIE_BIFURCATION in main

It should be `BASE_PCIE_BIFURCATION` instead of
USE_BASE_PCIE_BIFURCATION.

Google-Bug-Id: 460189266
Change-Id: I08decd8b1170c36a53b511b5e03f313410ceddcc
Signed-off-by: Willy Tu <wltu@google.com>

fru/main.cpp

diff --git a/fru/main.cpp b/fru/main.cpp
index e74f8d8..82e46ff 100644
--- a/fru/main.cpp
+++ b/fru/main.cpp
@@ -10,7 +10,7 @@
 
 int main()
 {
-#ifdef USE_BASE_PCIE_BIFURCATION
+#ifdef BASE_PCIE_BIFURCATION
     google::pcie_bifurcation::PCIeBifurcation pcieBifurcation(
         pcieConfigFilePath);
     std::cout << "Using base PCIeBifurcation implementation\n";