ShellPkg: Assign the correct value to ShellStatus

ShellPkg: Assign the correct value to ShellStatus

Since the type of ShellStatus is SHELL_STATUS, we should use
SHELL_INVALID_PARAMETER instead of EFI_INVALID_PARAMETER.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Gary Lin <glin@suse.com>
Cc: Zhang Lubo <lubo.zhang@intel.com>
Cc: Ye Ting <ting.ye@intel.com>
Cc: Fu Siyuan <siyuan.fu@intel.com>
Cc: Wu Jiaxin <jiaxin.wu@intel.com>
Reviewed-by: Jaben Carsey <jaben.carsey@intel.com>
Reviewed-by: Ye Ting <ting.ye@intel.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>
Reviewed-by: Zhang Lubo <lubo.zhang@intel.com>
Reviewed-by: Wu Jiaxin <jiaxin.wu@intel.com>