API which needs modification: GPTIMER_clrIRQStatus

Any API with IRQStatus in the name should be included in the changes.

The TIMER_IRQSTATUS register has bits where if we write 1, it clears the bit, and writing 0 has no affect on the specific bit.

Current implementation reads the register and performs an OR operation.

We need to simply perform a write operation instead of performing an OR.

The OR approach takes more time than a simple write.