Fix Bug to convert low Hex string to handle L'A' - L'F' Fix Bug in HiiConstructConfigHdr API to support NULL DriverHandle.
Fix Bug to convert low Hex string to handle L'A' - L'F'
Fix Bug in HiiConstructConfigHdr API to support NULL DriverHandle.

git-svn-id: 5648d1bec6962b0a6d1d1b40eba8cf5cdb62da3d@8074 6f19259b-4bc3-4df7-8a09-765794883524

MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2