UefiCpuPkg/MpInitLib: MicrocodeDetect: Ensure checked range is valid

UefiCpuPkg/MpInitLib: MicrocodeDetect: Ensure checked range is valid

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1934

0x0       MicrocodeBegin  MicrocodeEntry  MicrocodeEnd      0xffffffff
|--------------|---------------|---------------|---------------|
                                 valid TotalSize
TotalSize is only valid between 0 and (MicrocodeEnd - MicrocodeEntry).
So add '(UINTN)MicrocodeEntryPoint > (MAX_ADDRESS - TotalSize)' before
'((UINTN)MicrocodeEntryPoint + TotalSize) > MicrocodeEnd' to make sure
((UINTN)MicrocodeEntryPoint + TotalSize) wouldn't overflow.

Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Zhichao Gao <zhichao.gao@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>