mtd: denali: avoid using a magic number

MAP10 command with '0x2000' data sets up a read-ahead/write access.
Signed-off-by: NMasahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

drivers/mtd/nand/denali.c

@@ -74,6 +74,7 @@ MODULE_PARM_DESC(onfi_timing_mode, "Overrides default ONFI setting."
 #define SPARE_ACCESS		0x41
 #define MAIN_ACCESS		0x42
 #define MAIN_SPARE_ACCESS	0x43
+#define PIPELINE_ACCESS		0x2000
 
 #define DENALI_READ	0
 #define DENALI_WRITE	0x100
@@ -765,7 +766,7 @@ static int denali_send_pipeline_cmd(struct denali_nand_info *denali,
 			iowrite32(cmd, denali->flash_mem);
 		} else {
 			index_addr(denali, (uint32_t)cmd,
-					0x2000 | op | page_count);
+					PIPELINE_ACCESS | op | page_count);
 
 			/* wait for command to be accepted
 			 * can always use status0 bit as the