BaseTools: Fix the bug for Pcd used in command line's override

BaseTools: Fix the bug for Pcd used in command line's override

V2: remove the not used parameter i

Fix the bug for Pcd used in command line not override the Pcd used
in the [component] driver's sub-section.

Case:
DSC file:
[PcdsFixedAtBuild]
TokenSpaceGuid.PcdTest

[Components]
 TestPkg/TestDriver.inf {
  <PcdsFixedAtBuild>
  TokenSpaceGuid.PcdTest|"b"
  }

build command with --pcd TokenSpaceGuid.PcdTest="AAAABB"

Then we found the Pcd value in the AutoGen.c file is incorrect,
because of the incorrect logic that use the pcd in the [component]
section to re-override it.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Yonghong Zhu <yonghong.zhu@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>