mm/cma_debug.c: align the name buffer length as struct cma

Avoids truncating the debugfs output to 16 chars. Potentially alters
the userspace output, but this is a debugfs interface and there are no
stability guarantees.

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Kassey Li <[e-mail]>
Cc: Sasha Levin <[e-mail]>
Cc: Joonsoo Kim <[e-mail]>
Cc: Minchan Kim <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>

mm/cma_debug.c

···
 static void cma_debugfs_add_one(struct cma *cma, struct dentry *root_dentry)
 {
 	struct dentry *tmp;
-	char name[16];
+	char name[CMA_MAX_NAME];
 
 	scnprintf(name, sizeof(name), "cma-%s", cma->name);