Multiple copies of pci-dma.c file.

[Dan Aizenstros <dan@vcubed.com>]

Hello All,

Is there any reason for having multiple copies of
the pci-dma.c file in Linux/MIPS.  The are all
doing basically the same thing.  We could have
just one copy in the arch/mips/lib directory
and have the Makefile build it if CONFIG_PCI
is defined.

Also they appear to have an error in that they
convert the pointer that is returned from the
__get_free_pages function call into a KSEG1
address even if the pointer is NULL.

Dan Aizenstros
Software Engineer
V3 Semiconductor Corp.