BCM1480_DUART_CHANREG_SPACING
BCM1480_DUART_CHANREG_SPACING * (((chan) & 1) + 1) + (reg))
BCM1480_DUART_CHANREG_SPACING * 3 + (reg))
#define DUART_CHANREG_SPACING BCM1480_DUART_CHANREG_SPACING
