SourceLevelDebugPkg/DebugTimer: Timer count value 0 not calculated

Actually, TimerCycle is APIC timer's initial count. Timer count value 0 is
missed when calculating Delta value.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18329 6f19259b-4bc3-4df7-8a09-765794883524
2 files changed