Issue Description:
In the Delete API (CsitxDrv_delete) of CSITX, driver first takes instance semaphore lock, and then calls CsitxDrv_eventGroupUnRegister, which also takes semaphore lock on the same semaphore. This causes in the hang in the delete API.

Resolution Description:
Removed semaphore lock from event unregister API ,as instance semaphore is already obtained by CSITX driver delete API.