NAND: add more watchdog resets

Poke the watchdog in a variety of looping constructs, which could take
a long time to complete.

Signed-off-by: Scott Wood <scottwood@freescale.com>

drivers/mtd/nand/nand_base.c

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 70c0593..b9bd394 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -1156,6 +1156,8 @@
 	oob = ops->oobbuf;
 
 	while(1) {
+		WATCHDOG_RESET();
+
 		bytes = min(mtd->writesize - col, readlen);
 		aligned = (bytes == mtd->writesize);
 
@@ -1485,6 +1487,7 @@
 	page = realpage & chip->pagemask;
 
 	while(1) {
+		WATCHDOG_RESET();
 		sndcmd = chip->ecc.read_oob(mtd, chip, page, sndcmd);
 
 		len = min(len, readlen);
@@ -1884,6 +1887,8 @@
 		memset(chip->oob_poi, 0xff, mtd->oobsize);
 
 	while(1) {
+		WATCHDOG_RESET();
+
 		int bytes = mtd->writesize;
 		int cached = writelen > bytes && page != blockmask;
 		uint8_t *wbuf = buf;
@@ -2215,6 +2220,7 @@
 	instr->state = MTD_ERASING;
 
 	while (len) {
+		WATCHDOG_RESET();
 		/*
 		 * heck if we have a bad block, we do not erase bad blocks !
 		 */

drivers/mtd/nand/nand_util.c

diff --git a/drivers/mtd/nand/nand_util.c b/drivers/mtd/nand/nand_util.c
index 8b4f738..5a6f7ae 100644
--- a/drivers/mtd/nand/nand_util.c
+++ b/drivers/mtd/nand/nand_util.c
@@ -542,6 +542,8 @@
 
 			pages = write_size / pagesize_oob;
 			for (page = 0; page < pages; page++) {
+				WATCHDOG_RESET();
+
 				ops.datbuf = p_buffer;
 				ops.oobbuf = ops.datbuf + pagesize;