mtd: nand: denali: remove redundant define of BANK(x)

This macro is defined twice in denali.c (around line 98 and
line 651), so remove the second one.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c
index f993e13..c9806e6 100644
--- a/drivers/mtd/nand/denali.c
+++ b/drivers/mtd/nand/denali.c
@@ -648,7 +648,6 @@
 	spin_unlock(&denali->irq_lock);
 	return result;
 }
-#define BANK(x) ((x) << 24)
 
 static uint32_t wait_for_irq(struct denali_nand_info *denali, uint32_t irq_mask)
 {