SecurityPkg/Tcg: Fix bug that prevented SubmitCommand buffers from being Max size

SecurityPkg/Tcg: Fix bug that prevented SubmitCommand buffers from being Max size

SubmitCommand() was checking the buffer size for ">=" Max size. This would
cause code to fail with "EFI_INVALID_PARAMETER" if a buffer was passed
that was the "max" size as indicated by the GetCapability() command.
Change to ">" to allow for maximum buffer size.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Bret Barkelew <brbarkel@microsoft.com>
Reviewed-by: Yao Jiewen <jiewen.yao@intel.com>
Reviewed-by: Chao Zhang <chao.b.zhang@intel.com>