There is a plan to build the kernel with -Wimplicit-fallthrough and
these places in the code produced warnings (W=1).
This commit removes the following warnings:
  drivers/mtd/nand/raw/nand_legacy.c:332:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
  drivers/mtd/nand/raw/nand_legacy.c:483:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
Signed-off-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
                 */
                if (column == -1 && page_addr == -1)
                        return;
+               /* fall through */
 
        default:
                /*
                chip->legacy.cmd_ctrl(chip, NAND_CMD_NONE,
                                      NAND_NCE | NAND_CTRL_CHANGE);
 
-               /* This applies to read commands */
+               /* fall through - This applies to read commands */
        default:
                /*
                 * If we don't have access to the busy pin, we apply the given