i2c: piix4: Fully initialize SB800 before it is registered
This closes a race window where I2C device drivers attempt to access I2C buses which aren't fully initialized yet. Signed-off-by: Jean Delvare <jdelvare@suse.de> Tested-by: Christian Fetzer <fetzer.ch@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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