[SCSI] mptfusion: correct Kconfig problem

The fusion Kconfig forgets to set CONFIG_FUSION, which is required to
get the upper makefile to descend into the fusion directory.  Add this
back as a variable and make the two upper level modules select it.
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

drivers/message/fusion/Kconfig

 
 menu "Fusion MPT device support"
 
+config FUSION
+	bool
+	default n
+
 config FUSION_SPI
 	tristate "Fusion MPT ScsiHost drivers for SPI"
 	depends on PCI && SCSI
+	select FUSION
 	---help---
 	  SCSI HOST support for a parallel SCSI host adapters.
 
@@ -17,6 +22,7 @@ config FUSION_SPI
 config FUSION_FC
 	tristate "Fusion MPT ScsiHost drivers for FC"
 	depends on PCI && SCSI
+	select FUSION
 	---help---
 	  SCSI HOST support for a Fiber Channel host adapters.