[SCSI] fusion: fix warning when not using procfs

Fixes the following warning:
drivers/message/fusion/mptbase.c:129: warning: 'mpt_proc_root_dir' defined but not used
also moves it from public data section since it is static.
Signed-off-by: NErik Ekman <erik@kryo.se>
Acked-by: N"Desai, Kashyap" <Kashyap.Desai@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

drivers/message/fusion/mptbase.c

@@ -126,8 +126,6 @@ static int mfcounter = 0;
  *  Public data...
  */
 
-static struct proc_dir_entry *mpt_proc_root_dir;
-
 #define WHOINIT_UNKNOWN		0xAA
 
 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
@@ -146,6 +144,9 @@ static MPT_EVHANDLER		 MptEvHandlers[MPT_MAX_PROTOCOL_DRIVERS];
 static MPT_RESETHANDLER		 MptResetHandlers[MPT_MAX_PROTOCOL_DRIVERS];
 static struct mpt_pci_driver 	*MptDeviceDriverHandlers[MPT_MAX_PROTOCOL_DRIVERS];
 
+#ifdef CONFIG_PROC_FS
+static struct proc_dir_entry 	*mpt_proc_root_dir;
+#endif
 
 /*
  *  Driver Callback Index's