msm: camera: sensor: I2C poll implementation

Remove additional delay after poll.
Delay in ms is acounted during polling the register.
If read is successful and match fails,
then poll is non-fatal.

CRs-Fixed: 971014
Change-Id: I655a272bed125edc2dc60504640f1d57652a64e2
Signed-off-by: Rajesh Bondugula <rajeshb@codeaurora.org>