[IRDA] Remove uses of isa_virt_to_bus

[Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>]

Hi:

This patch removes the references to isa_virt_to_bus in the
relevant ISA IRDA drivers by calling dma_alloc_coherent.

Cheers,
-- 
Debian GNU/Linux 3.0 is out! ( http://www.debian.org/ )
Email:  Herbert Xu ~{PmV>HI~} <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
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