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6a08a92ec4
dn and dp of USB1 can share with UART1(UART1 can route rx,tx to dn and dp pins of USB1). here we add this pinmux capability. USB1/UART1 mode selection has dedicated control register in RSC module, here we attach the register offset of private data of related pin groups. Signed-off-by: Rong Wang <Rong.Wang@csr.com> Signed-off-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>