[PATCH v4] i2c: busses: Use min() to improve code

[Qianfeng Rong]

>> Signed-off-by: Qianfeng Rong <rongqianfeng at vivo.com>
>> Reviewed-by: Patrice Chotard <patrice.chotard at foss.st.com>
>> Suggested-by: Jonathan Cameron <Jonathan.Cameron at huawei.com>
> The 'Suggested-by' tag implies that the patch was suggested by
> Jonathan, which is not the case here. Jonathan reviewed the patch
> and proposed improvements, but the patch itself comes from you.
>
Thank you, Andi, for your patient explanation.

Best regards,
Qianfeng