OvmfPkg: Add QemuFwCfgLib library class and implementation

QEMU's Firmware Configuration interface gives the firmware
access to various types of information.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13383 6f19259b-4bc3-4df7-8a09-765794883524
diff --git a/OvmfPkg/OvmfPkgX64.dsc b/OvmfPkg/OvmfPkgX64.dsc
index a312ddb..f2bd5a7 100644
--- a/OvmfPkg/OvmfPkgX64.dsc
+++ b/OvmfPkg/OvmfPkgX64.dsc
@@ -94,6 +94,7 @@
   DpcLib|MdeModulePkg/Library/DxeDpcLib/DxeDpcLib.inf

   UefiUsbLib|MdePkg/Library/UefiUsbLib/UefiUsbLib.inf

   SerializeVariablesLib|OvmfPkg/Library/SerializeVariablesLib/SerializeVariablesLib.inf

+  QemuFwCfgLib|OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLib.inf

   LockBoxLib|MdeModulePkg/Library/LockBoxNullLib/LockBoxNullLib.inf

 

 !ifdef $(SOURCE_DEBUG_ENABLE)