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We have 3 files now which have the need to count the number of I2cSerialBus resources in an ACPI-device's resource-list. Currently all implement their own helper function for this, add a generic helper function to replace the 3 implementations. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Link: https://lore.kernel.org/r/20210803160044.158802-2-hdegoede@redhat.com Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Wolfram Sang <wsa@kernel.org>