[IA64] a fix towards allmodconfig build

The HP_SIMSCSI driver can't be built as a module (unhealthy dependencies on
things that shouldn't really be exported).

Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Tony Luck <[e-mail]>

arch/ia64/hp/sim/Kconfig

···
 	depends on HP_SIMSERIAL
 
 config HP_SIMSCSI
-	tristate "Simulated SCSI disk"
-	depends on SCSI
+	bool "Simulated SCSI disk"
+	depends on SCSI=y
 
 endmenu