This patch removes some unnecessary casts in the PCI IDE device,
introduced by commit 552908fef5b67ad9d96b76d7cb8371ebc26c9bc8
'PCI IDE: Use PCI DMA stub functions'.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>