OvmfPkg: resolve CpuExceptionHandlerLib for DXE_SMM_DRIVER modules
    
    UefiCpuPkg/PiSmmCpuDxeSmm depends on this library (the
    RegisterCpuInterruptHandler() function specifically) to set up its
    specialized page fault handler (SmiPFHandler() -> DumpModuleInfoByIp()).
    It doesn't hurt to resolve this library class for all DXE_SMM_DRIVER
    modules.
    
    Contributed-under: TianoCore Contribution Agreement 1.0
    Signed-off-by: Laszlo Ersek <lersek@redhat.com>
    Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>