mtd: move from strlcpy with unused retval to strscpy

Follow the advice of the below link and prefer 'strscpy' in this
subsystem. Conversion is 1:1 because the return value is not used.
Generated by a coccinelle script.

Link: https://lore.kernel.org/r/CAHk-=wgfRnXz0W3D37d01q3JFkr_i_uTL=[e-mail]/
Signed-off-by: Wolfram Sang <[e-mail]>
Signed-off-by: Miquel Raynal <[e-mail]>
Link: https://lore.kernel.org/linux-mtd/[e-mail]

drivers/mtd/devices/block2mtd.c

···
 	   the device (even kmalloc() fails). Deter that work to
 	   block2mtd_setup2(). */
 
-	strlcpy(block2mtd_paramline, val, sizeof(block2mtd_paramline));
+	strscpy(block2mtd_paramline, val, sizeof(block2mtd_paramline));
 
 	return 0;
 #endif

drivers/mtd/parsers/cmdlinepart.c

···
 	parts[this_part].mask_flags = mask_flags;
 	parts[this_part].add_flags = add_flags;
 	if (name)
-		strlcpy(extra_mem, name, name_len + 1);
+		strscpy(extra_mem, name, name_len + 1);
 	else
 		sprintf(extra_mem, "Partition_%03d", this_part);
 	parts[this_part].name = extra_mem;
···
 		this_mtd->parts = parts;
 		this_mtd->num_parts = num_parts;
 		this_mtd->mtd_id = (char*)(this_mtd + 1);
-		strlcpy(this_mtd->mtd_id, mtd_id, mtd_id_len + 1);
+		strscpy(this_mtd->mtd_id, mtd_id, mtd_id_len + 1);
 
 		/* link into chain */
 		this_mtd->next = partitions;