IntelFsp2Pkg: Fix GCC49/XCODE build failure
IntelFsp2Pkg: Fix GCC49/XCODE build failure

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1276

Fixed potentially uninitialized variable build failure
caused by commit: b1cc6f672f3b924cdb190e5b92db3b47f46a8911

Test: Verified on internal platform and boots successfully.

Cc: Jiewen Yao <1b630bbf68c0ea110d75f22c1f8a37a44b6a79b4@intel.com>
Cc: Desimone Nathaniel L <21445a9ad2457c16f914695a064cf9133c5ac714@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Chasel Chiu <4e98541b562eca5636375e2a22ba82080a5e1be7@intel.com>
Reviewed-by: Jiewen Yao <1b630bbf68c0ea110d75f22c1f8a37a44b6a79b4@intel.com>

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