mtd: ubi: gluebi: Fix misnamed function parameter documentation

Fixes the following W=1 kernel build warning(s):

drivers/mtd/ubi/gluebi.c:446: warning: Function parameter or member 'ns_ptr' not described in 'gluebi_notify'
drivers/mtd/ubi/gluebi.c:446: warning: Excess function parameter 'ptr' description in 'gluebi_notify'

Cc: Richard Weinberger <[e-mail]>
Cc: Miquel Raynal <[e-mail]>
Cc: Vignesh Raghavendra <[e-mail]>
Cc: [e-mail]
Signed-off-by: Lee Jones <[e-mail]>
Signed-off-by: Miquel Raynal <[e-mail]>
Link: https://lore.kernel.org/linux-mtd/[e-mail]

drivers/mtd/ubi/gluebi.c

···
  * gluebi_notify - UBI notification handler.
  * @nb: registered notifier block
  * @l: notification type
- * @ptr: pointer to the &struct ubi_notification object
+ * @ns_ptr: pointer to the &struct ubi_notification object
  */
 static int gluebi_notify(struct notifier_block *nb, unsigned long l,
 			 void *ns_ptr)