MdeModulePkg/PlatformBootManager: Add PlatformBootManagerUnableToBoot

The patch adds a new API PlatformBootManagerUnableToBoot()
to PlatformBootManagerLib.
The new API is provided by platform bds library and is called when
no boot option could be launched.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Sean Brogan <sean.brogan@microsoft.com>
Cc: Michael Turner <Michael.Turner@microsoft.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Sunny Wang <sunnywang@hpe.com>

MdeModulePkg/Include/Library/PlatformBootManagerLib.h

@@ -59,4 +59,17 @@ PlatformBootManagerWaitCallback (
   UINT16          TimeoutRemain
   );
 
+/**
+  The function is called when no boot option could be launched,
+  including platform recovery options and options pointing to applications
+  built into firmware volumes.
+
+  If this function returns, BDS attempts to enter an infinite loop.
+**/
+VOID
+EFIAPI
+PlatformBootManagerUnableToBoot (
+  VOID
+  );
+
 #endif