mtd: nand: use NAND_HAS_CACHEPROG

We have this unused macro, let's use it and justify its existence.
Signed-off-by: NArtem Bityutskiy <artem.bityutskiy@linux.intel.com>
Acked-by: NBrian Norris <computersforpeace@gmail.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/nand/nand_base.c

@@ -2059,7 +2059,7 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
 	 */
 	cached = 0;
 
-	if (!cached || !(chip->options & NAND_CACHEPRG)) {
+	if (!cached || !NAND_HAS_CACHEPROG(chip)) {
 
 		chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
 		status = chip->waitfunc(mtd, chip);

include/linux/mtd/nand.h

@@ -167,7 +167,7 @@ typedef enum {
 #define NAND_SUBPAGE_READ	0x00001000
 
 /* Options valid for Samsung large page devices */
-#define NAND_SAMSUNG_LP_OPTIONS (NAND_CACHEPRG)
+#define NAND_SAMSUNG_LP_OPTIONS NAND_CACHEPRG
 
 /* Macros to identify the above */
 #define NAND_HAS_CACHEPROG(chip) ((chip->options & NAND_CACHEPRG))