i2c: xiic: fix indentation issue

There is a statement that is indented one level too deeply, remove
the extraneous tab.

Fixes: b4c119db ("i2c: xiic: Add timeout to the rx fifo wait loop")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Reviewed-by: NShubhrajyoti Datta <shubhrajyoti.datta@gmail.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>