[BOOT:MM] Finish MmFwGetMemoryMap()

Added stub for MmMdFindDescriptorFromMdl().

BOOT/ENVIRON/LIB/MM/mmmd.c

@@ -386,6 +386,45 @@ Return Value:
     }
 }
 
+PMEMORY_DESCRIPTOR
+MmMdFindDescriptorFromMdl (
+    IN PMEMORY_DESCRIPTOR_LIST Mdl,
+    IN ULONGLONG Page,
+    IN ULONG Flags
+    )
+
+/*++
+
+Routine Description:
+
+    Searches an MDL for the descriptor containing a page.
+
+Arguments:
+
+    Mdl - The MDL to search.
+
+    Page - The page to search for.
+
+    Flags - MDL_OPERATION_FLAGS_*
+        MDL_OPERATION_FLAGS_PHYSICAL if Page is physical.
+        MDL_OPERATION_FLAGS_VIRTUAL if Page is virtual.
+
+Return Value:
+
+    Pointer to the descriptor if successful.
+    NULL if an error occurs.
+
+--*/
+
+
+{
+    //
+    // TODO: Implement this routine.
+    //
+
+    return NULL;
+}
+
 NTSTATUS
 MmMdRemoveRegionFromMdlEx (
     IN PMEMORY_DESCRIPTOR_LIST Mdl,