MdePkg/BaseLib: Add NULL version Tdx functions for other architectures

Currently, the NULL version Tdx functions are only built for Ia32.
In BaseLib, the others architectures also need such NULL version
Tdx functions.

Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Min Xu <min.m.xu@intel.com>
Signed-off-by: Ceping Sun <cepingx.sun@intel.com>

MdePkg/Include/Library/BaseLib.h

@@ -5259,8 +5259,6 @@ SpeculationBarrier (
   VOID
   );
 
-#if defined (MDE_CPU_X64) || defined (MDE_CPU_IA32)
-
 /**
   The TDCALL instruction causes a VM exit to the Intel TDX module.  It is
   used to call guest-side Intel TDX functions, either local or a TD exit
@@ -5323,8 +5321,6 @@ TdIsEnabled (
   VOID
   );
 
-#endif
-
 #if defined (MDE_CPU_X64)
 //
 // The page size for the PVALIDATE instruction

MdePkg/Library/BaseLib/BaseLib.inf

@@ -339,6 +339,7 @@
   Ebc/SpeculationBarrier.c
   Unaligned.c
   Math64.c
+  IntelTdxNull.c
 
 [Sources.ARM]
   Arm/InternalSwitchStack.c
@@ -364,6 +365,7 @@
   Arm/CpuBreakpoint.S           | GCC
   Arm/MemoryFence.S             | GCC
   Arm/SpeculationBarrier.S      | GCC
+  IntelTdxNull.c
 
 [Sources.AARCH64]
   Arm/InternalSwitchStack.c
@@ -391,6 +393,7 @@
   AArch64/SpeculationBarrier.asm    | MSFT
   AArch64/ArmReadCntPctReg.asm      | MSFT
   AArch64/ArmReadIdAA64Isar0Reg.asm     | MSFT
+  IntelTdxNull.c
 
 [Sources.RISCV64]
   Math64.c
@@ -412,6 +415,7 @@
   RiscV64/ReadTimer.S               | GCC
   RiscV64/RiscVMmu.S                | GCC
   RiscV64/SpeculationBarrier.S      | GCC
+  IntelTdxNull.c
 
 [Sources.LOONGARCH64]
   Math64.c
@@ -432,6 +436,7 @@
   LoongArch64/ExceptionBase.S       | GCC
   LoongArch64/Cpucfg.S              | GCC
   LoongArch64/ReadStableCounter.S   | GCC
+  IntelTdxNull.c
 
 [Packages]
   MdePkg/MdePkg.dec