fs: fat: add missing MODULE_DESCRIPTION() macros

Fix the 'make W=1' warnings:
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/fat/fat.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/fat/fat_test.o

Signed-off-by: Jeff Johnson <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Acked-by: OGAWA Hirofumi <[email protected]>
Acked-by: Al Viro <[email protected]>
Signed-off-by: Christian Brauner <[email protected]>

Author: Jeff Johnson

fs/fat/fat_test.c

@@ -193,4 +193,5 @@ static struct kunit_suite fat_test_suite = {
 
 kunit_test_suites(&fat_test_suite);
 
+MODULE_DESCRIPTION("KUnit tests for FAT filesystems");
 MODULE_LICENSE("GPL v2");

fs/fat/inode.c

@@ -1978,4 +1978,5 @@ static void __exit exit_fat_fs(void)
 module_init(init_fat_fs)
 module_exit(exit_fat_fs)
 
+MODULE_DESCRIPTION("Core FAT filesystem support");
 MODULE_LICENSE("GPL");