i2c: busses: i2c-qcom-geni: Add support for auto-suspend

Add support for auto-suspend to minimize any delay between back-to-back
transfers. Add auto-suspend support only for FIFO & DMA modes.

CRs-Fixed: 2132551
Change-Id: I065a3959bb24e89d50d8c475b61d41470a1b43a6
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@codeaurora.org>