OvmfPkg: CsmSupportLib: depend on OvmfPkg.dec explicitly
    
    SVN r16375 (git commit 72a11001, "OvmfPkg: CsmSupportLib: Set/use platform
    specific legacy interrupt device") added the
    
      gUefiOvmfPkgTokenSpaceGuid.PcdOvmfHostBridgePciDevId
    
    PCD to CsmSupportLib. Since that "namespace" GUID is declared in
    OvmfPkg/OvmfPkg.dec, and we've not used anything from OvmfPkg/OvmfPkg.dec
    in CsmSupportLib.inf thus far, this is a new [Packages] dependency and
    must be named.
    
    Contributed-under: TianoCore Contribution Agreement 1.0
    Signed-off-by: Laszlo Ersek <lersek@redhat.com>
    
    git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16414 6f19259b-4bc3-4df7-8a09-765794883524