i2c-qcom-geni: move geni_i2c_driver_init to async probe

To reduce boot time to first stage.

Before:
[    1.221918] init: init first stage started!

After:
[    1.182935] init: init first stage started!

Bug: 129688998
Test: reboot 100 times, camera, wifi, basic operation
Change-Id: I25aaf2bd7e1a031fa85930ddfb570c86b8c8ce79
Signed-off-by: Rick Yiu <rickyiu@google.com>