fs/adfs: add MODULE_DESCRIPTION

Fix the 'make W=1' issue:
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/adfs/adfs.o
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/r/20240523-md-adfs-v1-1-364268e38370@quicinc.comSigned-off-by: Christian Brauner <brauner@kernel.org>

fs/adfs/super.c

@@ -491,4 +491,5 @@ static void __exit exit_adfs_fs(void)
 
 module_init(init_adfs_fs)
 module_exit(exit_adfs_fs)
+MODULE_DESCRIPTION("Acorn Disc Filing System");
 MODULE_LICENSE("GPL");