i2c: qcom-geni: Provide support for ACPI

Add a match table to allow automatic probing of ACPI device
QCOM0220.  Ignore clock attainment errors.  Set default clock
frequency value.

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