sdbusplus: replace message::variant with std::variant

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I8c6fbef06cc2f208b3b6498bc6a4e099a34f9fb0
diff --git a/hiomap.cpp b/hiomap.cpp
index 8e714e7..f9d14b2 100644
--- a/hiomap.cpp
+++ b/hiomap.cpp
@@ -342,7 +342,7 @@
 {
     using namespace phosphor::logging;
 
-    std::map<std::string, sdbusplus::message::variant<bool>> msgData;
+    std::map<std::string, std::variant<bool>> msgData;
 
     sigtermResponse = SignalResponse::breakExecution;
     if (!active_event_updates)