1) DMA interrupt don't been cleaning up after one UDMA operation
2) Global variable mHobStart is not updated after invoking CoreInitializeGcdServices() func in the dxemain.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4107 6f19259b-4bc3-4df7-8a09-765794883524