i2c: rcar: refactor status bit handling
The old macros made it harder to see what was actually happening. Replace them with something more readable. Signed-off-by: NWolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: NGeert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: NWolfram Sang <wsa@the-dreams.de>
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