This patch allows scsi device flags like those in the current scsi_scan.c
device_list to be added via the command line or via /proc/scsi/device_info.

It also allows a default flag to be set via the command line.

This should allow for the (eventual) removal of the current device_list.

Example boot command line arguments:

scsi_default_dev_flags=0x1 scsi_dev_flags="IBM:LN V1.2Rack:0x200"

The above means that a SCSI device with vendor "IBM     ", model
(product) "LN V1.2Rack     " will get a flag of 0x200 during scanning,
meaning it should be treated like a SCSI-3 device for scanning. All
other devices without an entry would get the default flag value of 1,
so they would not be scanned past LUN 0 (the same behaviour as 
max_scsi_luns = 1).

I left the old device list and BLIST defines in scsi_scan.c.

I could not get lilo to allow two spaces, so I could not use this
with my device that has model "ST318203LC    !#". I didn't try grub.