[BOOT] Add stubs to complete MmPaInitialize()

MmPaInitialize() is now complete
Added BlpMmInitializeConstraints() and MmMdRemoveRegionFromMdlEx()

BOOT/ENVIRON/LIB/MM/mm.c

@@ -17,6 +17,36 @@ Abstract:
 #include "bootlib.h"
 #include "mm.h"
 
+NTSTATUS
+BlpMmInitializeConstraints (
+    VOID
+    )
+
+/*++
+
+Routine Description:
+
+    Initializes physical address constraints.
+
+Arguments:
+
+    None.
+
+Return Value:
+
+    STATUS_SUCCESS if successful,
+
+
+--*/
+
+{
+    //
+    // TODO: Implement this.
+    //
+
+    return STATUS_SUCCESS;
+}
+
 NTSTATUS
 BlpMmInitialize (
     IN PBOOT_MEMORY_INFO MemoryInfo,