When giving an invalid URI in Boot URI field within HTTP Boot
configuration page, the AsciiPrint will corrupt the setup screen.
This patch is to resolve the issue.
Cc: Fu Siyuan <siyuan.fu@intel.com>
Cc: Ye Ting <ting.ye@intel.com>
Cc: Jiaxin Wu <jiaxin.wu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Karunakar P <karunakarp@amiindia.co.in>
Reviewed-by: Jiaxin Wu <jiaxin.wu@intel.com>