scsi: myrs: only build on little-endian platforms

Reading throught the new driver, I noticed that this cannot work on
big-endian CPUs, and the old DAC960 had exactly the same behavior.

To document this for the future, add a Kconfig dependency that prevents it
from being included in big-endian kernels.  Since the hardware is really
old and we never had a working driver on it for big-endian platforms,
it's unlikely to make a difference to users.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/Kconfig

@@ -578,6 +578,7 @@ config SCSI_MYRB
 config SCSI_MYRS
 	tristate "Mylex DAC960/DAC1100 PCI RAID Controller (SCSI Interface)"
 	depends on PCI
+	depends on !CPU_BIG_ENDIAN || COMPILE_TEST
 	select RAID_ATTRS
 	help
 	  This driver adds support for the Mylex DAC960, AcceleRAID, and