MdePkg/PerformanceLib.h: Add new Perf macros

MdePkg/PerformanceLib.h: Add new Perf macros

1. Add new Perf macros for performance measurement
and related APIs and definitions in Performance
library class.

2. Update NULL performance library instance in MdePkg.

Cc: Liming Gao <liming.gao@intel.com>
Cc: Michael Kinney <michael.d.kinney@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Dandan Bi <dandan.bi@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>