UefiCpuPkg: Add CpuTimerDxeRiscV64 module

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4076

This DXE module initializes the timer interrupt handler
and installs the Arch Timer protocol.

Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Daniel Schaefer <git@danielschaefer.me>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Acked-by: Abner Chang <abner.chang@amd.com>
Reviewed-by: Andrei Warkentin <andrei.warkentin@intel.com>
Acked-by: Ray Ni <ray.ni@Intel.com>

UefiCpuPkg/CpuTimerDxeRiscV64/CpuTimerDxeRiscV64.inf

@@ -0,0 +1,51 @@
+## @file
+# Timer Arch protocol module
+#
+# Copyright (c) 2019, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x0001001b
+  BASE_NAME                      = CpuTimerDxeRiscV64
+  MODULE_UNI_FILE                = CpuTimerDxeRiscV64.uni
+  FILE_GUID                      = 055DDAC6-9142-4013-BF20-FC2E5BC325C9
+  MODULE_TYPE                    = DXE_DRIVER
+  VERSION_STRING                 = 1.0
+  ENTRY_POINT                    = TimerDriverInitialize
+#
+# The following information is for reference only and not required by the build
+# tools.
+#
+#  VALID_ARCHITECTURES           = RISCV64
+#
+[Packages]
+  MdePkg/MdePkg.dec
+  UefiCpuPkg/UefiCpuPkg.dec
+
+[LibraryClasses]
+  BaseLib
+  DebugLib
+  IoLib
+  CpuLib
+  UefiBootServicesTableLib
+  UefiDriverEntryPoint
+
+[LibraryClasses.RISCV64]
+  RiscVSbiLib
+
+[Sources.RISCV64]
+  Timer.h
+  Timer.c
+
+[Protocols]
+  gEfiCpuArchProtocolGuid       ## CONSUMES
+  gEfiTimerArchProtocolGuid     ## PRODUCES
+
+[Depex]
+  gEfiCpuArchProtocolGuid
+
+[UserExtensions.TianoCore."ExtraFiles"]
+  CpuTimerDxeRiscV64Extra.uni