Implement power control for x86 based platforms

This power control module provides the capability to
power on/off the host via gpio.
And provides some interfaces for system to contorl the system
power like:
    setPowerState
    getPowerState

Change-Id: Icd6530c42f2bc7c4d84062be786d25710b53f434
Signed-off-by: Kuiying Wang <kuiying.wang@intel.com>
diff --git a/gpio/inc/gpio.hpp b/gpio/inc/gpio.hpp
new file mode 100644
index 0000000..0c29381
--- /dev/null
+++ b/gpio/inc/gpio.hpp
@@ -0,0 +1,19 @@
+/*
+// Copyright (c) 2018 Intel Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#pragma once
+int configGpio(const char *gpioName, int *fd, sdbusplus::bus::bus &bus);
+int closeGpio(int fd);
\ No newline at end of file