i2c: designware: add an implement i2c protos
Include the i2c header and change the non confirming functions to do so. Cc: Heiko Schocher <hs@denx.de> Signed-off-by: NJeroen Hofstee <jeroen@myspectrum.nl> Acked-by: NHeiko Schocher <hs@denx.de> [trini: Fix i2c_get_bus_num prototype] Signed-off-by: NTom Rini <trini@ti.com>
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