qcom-geni-se: Disable FIFO watermark irq in DMA mode

Disable RX and TX FIFO watermark interrupts in SE_DMA mode
of transfer, as these interrupts are not required.

Signed-off-by: Shrey Vijay <shreyv@codeaurora.org>
Change-Id: I48b83d31b1eb2c651807bcd5b1052908b941dff2