mtd: nand: fix a typo in a comment line

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index b8eabde..f6c5685 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -3606,7 +3606,7 @@
 
 	chip->onfi_version = 0;
 	if (!type->name || !type->pagesize) {
-		/* Check is chip is ONFI compliant */
+		/* Check if the chip is ONFI compliant */
 		if (nand_flash_detect_onfi(mtd, chip, &busw))
 			goto ident_done;