mtd: nand: nandsim: fix spelling mistake: "weakpagess" -> "weakpages"

trivial fix to spelling mistake in NS_ERR error message
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Acked-by: NMarek Vasut <marek.vasut@gmail.com>
Signed-off-by: NBoris Brezillon <boris.brezillon@free-electrons.com>

drivers/mtd/nand/nandsim.c

@@ -901,7 +901,7 @@ static int parse_weakpages(void)
 		zero_ok = (*w == '0' ? 1 : 0);
 		page_no = simple_strtoul(w, &w, 0);
 		if (!zero_ok && !page_no) {
-			NS_ERR("invalid weakpagess.\n");
+			NS_ERR("invalid weakpages.\n");
 			return -EINVAL;
 		}
 		max_writes = 3;