MdeModulePkg/SetupBrowserDxe: Get default from callback for orderedList
MdeModulePkg/SetupBrowserDxe: Get default from callback for orderedList

For orderedlist question, the value is stored in a buffer,
not in HiiValue. So when need to get default value from callback
function for orderedlist, need to pass the buffer.
This patch is to enhance this logic.

Cc: Liming Gao <6480311aeeb4b006862f6d13ebabddc03f51e507@intel.com>
Cc: Eric Dong <fa9eeec52367040ac98013bc4b2913db170588f8@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Dandan Bi <1e8692d8ed8470b17e8ddd7612a0f029768dcb56@intel.com>
Reviewed-by: Eric Dong <fa9eeec52367040ac98013bc4b2913db170588f8@intel.com>
Reviewed-by: Liming Gao <6480311aeeb4b006862f6d13ebabddc03f51e507@intel.com>

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