drm: bridge: sii8620: retry hw reset with i2c failure

drm: bridge: sii8620: retry hw reset with i2c failure

With specific targets, sometimes(almost) i2c read is failed when hdmi
cable is plugged.

[  341.285875] sii8620 7-0039: I2C read of [0x0000] failed with code -6.
[  341.286149] sii8620 7-0039: Error accessing I2C bus, -6.

Retry hw reset operation of sii8620 mhl if i2c read is failed then can
do normal i2c operation. This solution came from android kernel.

Change-Id: Icf9f54eb941e3ac5a8728fb9552b51928578d508
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>