i2c: designware-pci: Make bus number allocation robust
On some platforms, such as Intel Medfield, the I2C slave devices are enumerated through SFI tables where bus numbering is expected to be defined in the OS. Make the bus number allocation robust for such platforms. Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: NJarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: NWolfram Sang <wsa@the-dreams.de>
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