MdeModulePkg DxeSmmPerformanceLib: Cover no SMM performance data case.

MdeModulePkg DxeSmmPerformanceLib: Cover no SMM performance data case.

1. Continue to get performance data by Performance Protocol
when no SMM performance data found.
2. Not try to get SMM performance data again
if no SMM performance handler found.
3. Correct typo 'totol' and 'guage'.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17561 6f19259b-4bc3-4df7-8a09-765794883524