ShellPkg/comp: Rename variable names to proper ones
ShellPkg/comp: Rename variable names to proper ones

The change doesn't impact the functionality.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Chen A Chen <2dbef1e3a7d44be73890e0574d9ab766e546f85f@intel.com>
Reviewed-by: Jaben Carsey <2d4ee76b36e91bee3a58378b7538904eb027a616@intel.com>

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