[PATCH] qla1280: cleanup qla1280_nvram_config

qla1280_nvram_config is a huge mess.  Split it up into managable
subroutines and add suport for the ISP1040 to it.  Add missing call
to set the age limit also on 1280/1x160.
Signed-off-by: Jes Sorensen <jes@wildopensource.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>