ShellPkg: Update tftp to build with current tip

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jaben Carsey <jaben.carsey@intel.com>
Signed-off-by: Tapan  Shah <tapandshah@hpe.com>
Signed-off-by: Jiaxin Wu <jiaxin.wu@intel.com>
Reviewed-by: Qiu Shumin <shumin.qiu@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18541 6f19259b-4bc3-4df7-8a09-765794883524
3 files changed