CR-1160935 : Fixed a issue for xbtest invalid card BDF (Xilinx#7519)

* Fixed a issue for xbtest invalid card BDF

* Fixed a issue for xbtest invalid card BDF

Signed-off-by: Saifuddin <saifuddi@xilinx.com>

* incorporate review comments

Signed-off-by: Saifuddin <saifuddi@xilinx.com>

---------

Signed-off-by: Saifuddin <saifuddi@xilinx.com>

src/runtime_src/core/pcie/linux/system_linux.cpp

@@ -127,17 +127,23 @@ std::shared_ptr<pci::dev>
 system_linux::
 get_pcidev(unsigned index, bool is_user) const
 {
-  if (is_user) {
-    if (index < user_ready_list.size())
-      return user_ready_list[index];
+  try {
+    if (is_user) {
+      if (index < user_ready_list.size())
+        return user_ready_list[index];
 
-    return user_nonready_list[index - user_ready_list.size()];
-  }
+      if ((index - user_ready_list.size()) < user_nonready_list.size())
+        return user_nonready_list.at(index - user_ready_list.size());
+    }
 
-  if (index < mgmt_ready_list.size())
-    return mgmt_ready_list[index];
+    if (index < mgmt_ready_list.size())
+      return mgmt_ready_list[index];
 
-  return mgmt_nonready_list[index - mgmt_ready_list.size()];
+    return mgmt_nonready_list.at(index - mgmt_ready_list.size());
+  }
+  catch (const std::exception&) {
+    return nullptr;
+  }
 }
 
 size_t