Revert "msm: kgsl: Device mutex lock for kgsl_cancel_event"

This reverts commit 21be614c104bcaa1c284977a784606a3db729d91.
Revert "msm: camera: Fix CCI I2C write fail to write for reg addr 0x00"

This reverts commit acd3f6c5b57a950046b660b74f0923ef36d2e7a9.