fs/fat: remove unnecessary wrapper fat_max_cache()

fat_max_cache() always returned FAT_MAX_CACHE and did not use the inode
parameter. So, use the FAT_MAX_CACHE constant directly.

Link: https://lkml.kernel.org/r/20251127175431.126516-1-lalitshankarch@gmail.com
Signed-off-by: Lalit Shankar Chowdhury <lalitshankarch@gmail.com>
Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: Christian Brauner <brauner@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Author: lalitshankarch

fs/fat/cache.c

@@ -29,11 +29,6 @@ struct fat_cache_id {
 	int dcluster;
 };
 
-static inline int fat_max_cache(struct inode *inode)
-{
-	return FAT_MAX_CACHE;
-}
-
 static struct kmem_cache *fat_cache_cachep;
 
 static void init_once(void *foo)
@@ -145,7 +140,7 @@ static void fat_cache_add(struct inode *inode, struct fat_cache_id *new)
 
 	cache = fat_cache_merge(inode, new);
 	if (cache == NULL) {
-		if (MSDOS_I(inode)->nr_caches < fat_max_cache(inode)) {
+		if (MSDOS_I(inode)->nr_caches < FAT_MAX_CACHE) {
 			MSDOS_I(inode)->nr_caches++;
 			spin_unlock(&MSDOS_I(inode)->cache_lru_lock);