serial: omap: Request pins using pinctrl framework
Request pins using pinctrl framework. Only show a warning on error as some boards set the pins in the bootloader even if CONFIG_PINCTRL is enabled. Signed-off-by: NTony Lindgren <tony@atomide.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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