add WATCHDOG_RESET() on nand write and read

Signed-off-by: giulio.benetti@micronovasrl.com
Acked-by: Wolfgang Denk <wd@denx.de>
Signed-off-by: Scott Wood <scottwood@freescale.com>
diff --git a/drivers/mtd/nand/nand_util.c b/drivers/mtd/nand/nand_util.c
index 694ead6..bec9277 100644
--- a/drivers/mtd/nand/nand_util.c
+++ b/drivers/mtd/nand/nand_util.c
@@ -508,6 +508,8 @@
 		size_t block_offset = offset & (nand->erasesize - 1);
 		size_t write_size;
 
+		WATCHDOG_RESET ();
+
 		if (nand_block_isbad (nand, offset & ~(nand->erasesize - 1))) {
 			printf ("Skip bad block 0x%08llx\n",
 				offset & ~(nand->erasesize - 1));
@@ -578,6 +580,8 @@
 		size_t block_offset = offset & (nand->erasesize - 1);
 		size_t read_length;
 
+		WATCHDOG_RESET ();
+
 		if (nand_block_isbad (nand, offset & ~(nand->erasesize - 1))) {
 			printf ("Skipping bad block 0x%08llx\n",
 				offset & ~(nand->erasesize - 1));