CFI: fix warning: variable ... set but not used

Fix:
cfi_mtd.c: In function 'cfi_mtd_init':
cfi_mtd.c:226:19: warning: variable 'mtd_list' set but not used [-Wunused-but-set-variable]
cfi_mtd.c: In function 'cfi_mtd_init':
cfi_mtd.c:225:6: warning: unused variable 'devices_found'
cfi_mtd.c: In function 'cfi_mtd_init':
cfi_mtd.c:226:19: warning: variable 'mtd_list' set but not used [-Wunused-but-set-variable]
[-Wunused-variable]

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Stefan Roese <sr@denx.de>
Acked-by: Stefan Roese <sr@denx.de>
diff --git a/drivers/mtd/cfi_mtd.c b/drivers/mtd/cfi_mtd.c
index cbcc165..8d74fa9 100644
--- a/drivers/mtd/cfi_mtd.c
+++ b/drivers/mtd/cfi_mtd.c
@@ -222,8 +222,10 @@
 	struct mtd_info *mtd;
 	flash_info_t *fi;
 	int error, i;
+#ifdef CONFIG_MTD_CONCAT
 	int devices_found = 0;
 	struct mtd_info *mtd_list[CONFIG_SYS_MAX_FLASH_BANKS];
+#endif
 
 	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
 		fi = &flash_info[i];
@@ -253,7 +255,9 @@
 		if (add_mtd_device(mtd))
 			return -ENOMEM;
 
+#ifdef CONFIG_MTD_CONCAT
 		mtd_list[devices_found++] = mtd;
+#endif
 	}
 
 #ifdef CONFIG_MTD_CONCAT