PLDM:Use new alias of DBUS_TIMEOUT for bus.call

This commit uses a new global variable for DBUS_TIMEOUT which is included as an input parameter for bus.call dbus calls. The new alias makes the bus.call function shorter and readable.

Change-Id: I336c97bc0631d5370ff3648e41f50e3e283d771b
Signed-off-by: vkaverap@in.ibm.com <vkaverap@in.ibm.com>
diff --git a/libpldmresponder/bios_config.cpp b/libpldmresponder/bios_config.cpp
index dec7b3f..e4b10c8 100644
--- a/libpldmresponder/bios_config.cpp
+++ b/libpldmresponder/bios_config.cpp
@@ -514,9 +514,7 @@
                                           "org.freedesktop.DBus.Properties",
                                           "Get");
         method.append(biosInterface, "BaseBIOSTable");
-        auto reply = bus.call(
-            method,
-            std::chrono::duration_cast<microsec>(sec(DBUS_TIMEOUT)).count());
+        auto reply = bus.call(method, dbusTimeout);
         std::variant<BaseBIOSTable> varBiosTable{};
         reply.read(varBiosTable);
         biosTable = std::get<BaseBIOSTable>(varBiosTable);
diff --git a/libpldmresponder/fru.cpp b/libpldmresponder/fru.cpp
index 98f696c..0821cd2 100644
--- a/libpldmresponder/fru.cpp
+++ b/libpldmresponder/fru.cpp
@@ -157,9 +157,7 @@
         auto method = bus.new_method_call(
             std::get<0>(dbusInfo).c_str(), std::get<1>(dbusInfo).c_str(),
             "org.freedesktop.DBus.ObjectManager", "GetManagedObjects");
-        auto reply = bus.call(
-            method,
-            std::chrono::duration_cast<microsec>(sec(DBUS_TIMEOUT)).count());
+        auto reply = bus.call(method, dbusTimeout);
         reply.read(objects);
     }
     catch (const std::exception& e)
@@ -253,9 +251,7 @@
                                           pldm::utils::dbusProperties, "Get");
         method.append("xyz.openbmc_project.Association", "endpoints");
         std::variant<std::vector<std::string>> paths;
-        auto reply = bus.call(
-            method,
-            std::chrono::duration_cast<microsec>(sec(DBUS_TIMEOUT)).count());
+        auto reply = bus.call(method, dbusTimeout);
         reply.read(paths);
         auto fwRunningVersion = std::get<std::vector<std::string>>(paths)[0];
         constexpr auto versionIntf = "xyz.openbmc_project.Software.Version";