ibft: fix kconfig dependencies

Fix kconfig dependency warning to satisfy dependencies:

warning: (BE2ISCSI && SCSI_LOWLEVEL && PCI && SCSI && NET || ISCSI_IBFT && ISCSI_IBFT_FIND && SCSI) selects ISCSI_BOOT_SYSFS which has unmet direct dependencies (SCSI_LOWLEVEL && SCSI)

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Peter Jones <pjones@redhat.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad@kernel.org>
diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
index 280c9b5..88a3ae6 100644
--- a/drivers/firmware/Kconfig
+++ b/drivers/firmware/Kconfig
@@ -125,7 +125,7 @@
 config ISCSI_IBFT
 	tristate "iSCSI Boot Firmware Table Attributes module"
 	select ISCSI_BOOT_SYSFS
-	depends on ISCSI_IBFT_FIND && SCSI
+	depends on ISCSI_IBFT_FIND && SCSI && SCSI_LOWLEVEL
 	default	n
 	help
 	  This option enables support for detection and exposing of iSCSI