OvmfPkg/PlatformBootManagerLib: connect consoles unconditionally
    
    If both ConIn and ConOut exist, but ConIn references none of the PS/2
    keyboard, the USB wild-card keyboard, and any serial ports, then
    PlatformInitializeConsole() currently allows the boot to proceed without
    any input devices at all. This makes for a bad user experience -- the
    firmware menu could only be entered through OsIndications, set by a guest
    OS.
    
    Do what ArmVirtQemu does already, namely connect the consoles, and add
    them to ConIn / ConOut / ErrOut, unconditionally. (The underlying
    EfiBootManagerUpdateConsoleVariable() function checks for duplicates.)
    
    The issue used to be masked by the EfiBootManagerConnectAll() call that
    got conditionalized in commit 245c643cc8b7.
    
    This patch is best viewed with "git show -b -W".
    
    Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
    Cc: Jordan Justen <jordan.l.justen@intel.com>
    Fixes: 245c643cc8b73240c3b88cb55b2911b285a8c10d
    Ref: https://bugzilla.redhat.com/show_bug.cgi?id=1577546
    Contributed-under: TianoCore Contribution Agreement 1.1
    Signed-off-by: Laszlo Ersek <lersek@redhat.com>