dfu: unify mmc/nand read/write ops enum

MMC and NAND independently defines same enumerators for read/write.
Unify them by defining enum in dfu header. RAM support that is being
added newly also can make use of it.

Signed-off-by: Afzal Mohammed <afzal.mohd.ma@gmail.com>
Cc: Heiko Schocher <hs@denx.de>
Cc: Marek Vasut <marex@denx.de>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Cc: Pantelis Antoniou <panto@antoniou-consulting.com>
Acked-by: Lukasz Majewski <l.majewski@samsung.com>
Acked-by: Marek Vasut <marex@denx.de>
Acked-by: Heiko Schocher <hs@denx.de>

drivers/dfu/dfu_mmc.c

@@ -13,16 +13,11 @@
 #include <div64.h>
 #include <dfu.h>
 
-enum dfu_mmc_op {
-	DFU_OP_READ = 1,
-	DFU_OP_WRITE,
-};
-
 static unsigned char __aligned(CONFIG_SYS_CACHELINE_SIZE)
 				dfu_file_buf[CONFIG_SYS_DFU_MAX_FILE_SIZE];
 static long dfu_file_buf_len;
 
-static int mmc_block_op(enum dfu_mmc_op op, struct dfu_entity *dfu,
+static int mmc_block_op(enum dfu_op op, struct dfu_entity *dfu,
 			u64 offset, void *buf, long *len)
 {
 	char cmd_buf[DFU_CMD_BUF_SIZE];
@@ -65,7 +60,7 @@ static int mmc_file_buffer(struct dfu_entity *dfu, void *buf, long *len)
 	return 0;
 }
 
-static int mmc_file_op(enum dfu_mmc_op op, struct dfu_entity *dfu,
+static int mmc_file_op(enum dfu_op op, struct dfu_entity *dfu,
 			void *buf, long *len)
 {
 	char cmd_buf[DFU_CMD_BUF_SIZE];

drivers/dfu/dfu_nand.c

@@ -19,12 +19,7 @@
 #include <jffs2/load_kernel.h>
 #include <nand.h>
 
-enum dfu_nand_op {
-	DFU_OP_READ = 1,
-	DFU_OP_WRITE,
-};
-
-static int nand_block_op(enum dfu_nand_op op, struct dfu_entity *dfu,
+static int nand_block_op(enum dfu_op op, struct dfu_entity *dfu,
 			u64 offset, void *buf, long *len)
 {
 	loff_t start, lim;

include/dfu.h

@@ -29,6 +29,11 @@ enum dfu_layout {
 	DFU_FS_EXT4,
 };
 
+enum dfu_op {
+	DFU_OP_READ = 1,
+	DFU_OP_WRITE,
+};
+
 struct mmc_internal_data {
 	/* RAW programming */
 	unsigned int lba_start;