BeagleBoardPkg: switch to use MdeModulePkg ResetSystemLib

The BeagleBoard port used EmbeddedPkg/ResetRuntimeDxe/ResetRuntimeDxe.inf
for its reset handling. With the arrival
MdeModulePkg/Universal/ResetSystemRuntimeDxe/ResetSystemRuntimeDxe.inf

As part of this, change BeagleBoardPkg/Library/ResetSystemLib to be an
implementation of ResetSystemLib instead of the previous
EfiResetSystemLib.

Wire all reset variants to ResetCold, except for ResetShutdown and
EnterS3WithImmediateWake, which return immediately.

Note: this ResetSystemLib never supported being called after
ExitBootservices, and this shortcoming is not addressed here.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>

BeagleBoardPkg/Library/ResetSystemLib/ResetSystemLib.inf

@@ -2,6 +2,7 @@
 # Reset System lib to make it easy to port new platforms
 #
 # Copyright (c) 2008, Apple Inc. All rights reserved.<BR>
+# Copyright (c) 2017, Linaro Ltd. All rights reserved.<BR>
 #
 #  This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD License
@@ -19,31 +20,23 @@
   FILE_GUID                      = 781371a2-3fdd-41d4-96a1-7b34cbc9e895
   MODULE_TYPE                    = BASE
   VERSION_STRING                 = 1.0
-  LIBRARY_CLASS                  = EfiResetSystemLib
+  LIBRARY_CLASS                  = ResetSystemLib
 
 
 [Sources.common]
   ResetSystemLib.c
 
 [Packages]
-  MdePkg/MdePkg.dec
   ArmPkg/ArmPkg.dec
-  EmbeddedPkg/EmbeddedPkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  MdePkg/MdePkg.dec
   Omap35xxPkg/Omap35xxPkg.dec
 
 [Pcd.common]
   gArmTokenSpaceGuid.PcdCpuResetAddress
-  gEmbeddedTokenSpaceGuid.PcdEmbeddedFdBaseAddress
 
 [LibraryClasses]
-  DebugLib
-  ArmLib
-  CacheMaintenanceLib
-  MemoryAllocationLib
-  UefiRuntimeServicesTableLib
-  TimerLib
-  UefiLib
-  UefiBootServicesTableLib
+  IoLib
 
 [Pcd]
   gArmTokenSpaceGuid.PcdFvBaseAddress