Indicates the timeout tick of holding spin lock.
 0 - No timeout.
 >0 - Timeout tick of holding spin lock.
  Spin Lock Timeout (us).
PCD Information
| Name | Token Space | Token number | Data Type | Default Value | 
| PcdSpinLockTimeout | gEfiMdePkgTokenSpaceGuid | 0x00000004 | UINT32 | 10000000 |