[SCSI] cxgb3i: fix select/depend problem

cxgb3i requires the cxgb3 net driver, so it selects it.  However,
cxgb3 has dependencies which the select cannot see.  Fix this by
separating out the cxgb3 dependencies into a separate hidden config
option (CONFIG_CHELSIO_T3_DEPENDS) and make both cxgb3 and cxgb3i
depend on it.
Reported-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Karen Xie <kxie@chelsio.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/net/Kconfig

@@ -2399,9 +2399,14 @@ config CHELSIO_T1_1G
           Enables support for Chelsio's gigabit Ethernet PCI cards.  If you
           are using only 10G cards say 'N' here.
 
+config CHELSIO_T3_DEPENDS
+	tristate
+	depends on PCI && INET
+	default y
+
 config CHELSIO_T3
 	tristate "Chelsio Communications T3 10Gb Ethernet support"
-	depends on PCI && INET
+	depends on CHELSIO_T3_DEPENDS
 	select FW_LOADER
 	select INET_LRO
 	help

drivers/scsi/cxgb3i/Kconfig

 config SCSI_CXGB3_ISCSI
 	tristate "Chelsio S3xx iSCSI support"
+	depends on CHELSIO_T3_DEPENDS
 	select CHELSIO_T3
 	select SCSI_ISCSI_ATTRS
 	---help---