i2c-msm-v2: update adapter device node in i2c driver

I2C framework in 3.14 kernel registers child nodes in the
i2c core instead of doing this manually in each driver.
This patch ensures adapter device node is same as i2c
bus platform device node before registration of the
nodes to i2c framework.

Change-Id: I9e5d4f7e4d924b0856af5afcb1c2e61ffd9d826f
Signed-off-by: Ankit Gupta <ankgupta@codeaurora.org>