MdeModulePkg/Gcd: Suppress incorrect compiler/analyzer warnings
MdeModulePkg/Gcd: Suppress incorrect compiler/analyzer warnings

It is caused by 0c9f2cb10b7ddec56a3440e77219fd3ab1725e5c
and false positive.
Initialize CpuArchAttributes to suppress incorrect
compiler/analyzer warnings.

Cc: Dandan Bi <1e8692d8ed8470b17e8ddd7612a0f029768dcb56@intel.com>
Cc: Jiewen Yao <364a90bfebd1f362ebb7b48e4bf8ec010adef203@intel.com>
Cc: Michael D Kinney <fd20bc543a9f65bb633fac7d08a403c1f1c8eb6c@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <5c6bb72efe464613af94e84c05522a361b23844a@intel.com>
Reviewed-by: Dandan Bi <1e8692d8ed8470b17e8ddd7612a0f029768dcb56@intel.com>

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