imx: ventana: make RS232 enable board specific
Not all Ventana boards have an RS232 transceiver, make it board specific.
Signed-off-by: NTim Harvey <tharvey@gateworks.com>
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Not all Ventana boards have an RS232 transceiver, make it board specific.
Signed-off-by: NTim Harvey <tharvey@gateworks.com>