[PATCH] qla1280: cleanup firmware loading, add pio-based loading

The ISP1040 needs to load firmware by PIO, and while we're at it clean
the convoluted mess of firmware loading up by splitting it into
managable subroutines.
Signed-off-by: Jes Sorensen <jes@wildopensource.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>