ShellPkg/AcpiView: Fix IA32 link error

ShellPkg/AcpiView: Fix IA32 link error

https://bugzilla.tianocore.org/show_bug.cgi?id=1970

Update SLIT_ELEMENT() macro to use MultU64x64() to
perform multiplication on 64-bit operands.  This is
required to avoid use of an intrinsic on IA32 VS20xx
builds.

Cc: Jaben Carsey <jaben.carsey@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Zhichao Gao <zhichao.gao@intel.com>
Cc: Sami Mujawar <sami.mujawar@arm.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Jaben Carsey <jaben.carsey@intel.com>
Reviewed-by: Zhichao Gao <zhichao.gao@intel.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
Tested-by: Sami Mujawar <sami.mujawar@arm.com>