irda: two branches in via_ircc_change_dongle_speed() are the same

in drivers/net/irda/via-ircc.c via_ircc_change_dongle_speed()

dongle_id case 0x0d:
two branches are the same whether `if (IsSIROn(iobase))' is true
or not. how should this be fixed?

Roel

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