i2c: virtio: Add snapshot of virtio i2c driver

Add snapshot of virtio i2c driver from msm-4.14.
This snapshot is taken as of msm-4.14 commit 972d72613cd1
("i2c: virtio: Fix return value issue of transfer function").

Change-Id: Idb4f6b5918f7d7237146d02839638b8a97a05c02
Signed-off-by: Zhiqiang Tu <ztu@codeaurora.org>