drivers: i2c: octeon: Revert early clear of IFLG

commit 0c7a3a973b18b9ce988402591f40b53d051ab81f from
git@git.assembla.com:cavium/WindRiver.linux.git

Early clear of IFLG bit breaks the protocol and
does not help with timing gain either. This was just
a suggestion from design team in order to reduce delay.
Remove it as its ineffective.

Change-Id: I0e26bfac24f38178af9d0910484aa30b8fd2a464
Signed-off-by: Suneel Garapati <sgarapati@marvell.com>
Reviewed-on: https://sj1git1.cavium.com/c/IP/SW/kernel/linux/+/39990


Reviewed-by: Chandrakala Chavva <cchavva@marvell.com>
Tested-by: sa_ip-sw-jenkins <sa_ip-sw-jenkins@marvell.com>
Signed-off-by: Ruiqiang Hao <Ruiqiang.Hao@windriver.com>