i2c: qcom-geni: Signify successful driver probe

The Qualcomm Geni I2C driver currently probes silently which can be
confusing when debugging potential issues.  Add a low level (INFO)
print when each I2C controller is successfully initially set-up.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>