ArmPlatformPkg: add Null implementation of LcdPlatformlLib

In order to be able to build ArmPlatformPkg components outside of
the context of a particular platform, add Null implementation of
LcdPlatformlLib.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>

ArmPlatformPkg/Library/LcdPlatformNullLib/LcdPlatformNullLib.inf

@@ -0,0 +1,28 @@
+#/** @file
+#
+#  Copyright (c) 2017, Linaro, Ltd. All rights reserved.
+#
+#  This program and the accompanying materials
+#  are licensed and made available under the terms and conditions of the BSD License
+#  which accompanies this distribution.  The full text of the license may be found at
+#  http://opensource.org/licenses/bsd-license.php
+#
+#  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+#**/
+
+[Defines]
+  INF_VERSION                    = 0x0001001A
+  BASE_NAME                      = LcdPlatformNullLib
+  FILE_GUID                      = b78d02bb-d0b5-4389-bc7f-b39ee846c784
+  MODULE_TYPE                    = BASE
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = LcdPlatformNullLib
+
+[Sources]
+  LcdPlatformNullLib.c
+
+[Packages]
+  ArmPlatformPkg/ArmPlatformPkg.dec
+  MdePkg/MdePkg.dec