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[ Upstream commit597688792c] i2c_master_hub is only used in i2c-qcom-geni.c now, change it to static. Fixes:cacd9643ec("i2c: qcom-geni: add support for I2C Master Hub variant") Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Reviewed-by: Bjorn Andersson <andersson@kernel.org> Signed-off-by: Wolfram Sang <wsa@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>