cciss: fix build for PROC_FS disabled

The recent patch to fix the removal of a non-existing proc
directory introduced this build problem for !CONFIG_PROC_FS:

drivers/block/cciss.c:4929: error: 'proc_cciss' undeclared (first use in this function)

Fix it by moving proc_cciss outside of the CONFIG_PROC_FS scope.
Reported-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NJens Axboe <jaxboe@fusionio.com>

drivers/block/cciss.c

@@ -66,6 +66,7 @@ MODULE_VERSION("3.6.26");
 MODULE_LICENSE("GPL");
 
 static DEFINE_MUTEX(cciss_mutex);
+static struct proc_dir_entry *proc_cciss;
 
 #include "cciss_cmd.h"
 #include "cciss.h"
@@ -363,8 +364,6 @@ static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
 #define ENG_GIG_FACTOR (ENG_GIG/512)
 #define ENGAGE_SCSI	"engage scsi"
 
-static struct proc_dir_entry *proc_cciss;
-
 static void cciss_seq_show_header(struct seq_file *seq)
 {
 	ctlr_info_t *h = seq->private;