fs: FS_POSIX_ACL does not depend on BLOCK

- Fix a kconfig unmet dependency warning.
- Remove the comment that identifies which filesystems use POSIX ACL
  utility routines.
- Move the FS_POSIX_ACL symbol outside of the BLOCK symbol if/endif block
  because its functions do not depend on BLOCK and some of the filesystems
  that use it do not depend on BLOCK.

warning: (GENERIC_ACL && JFFS2_FS_POSIX_ACL && NFSD_V4 && NFS_ACL_SUPPORT && 9P_FS_POSIX_ACL) selects FS_POSIX_ACL which has unmet direct dependencies (BLOCK)
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/Kconfig

@@ -30,15 +30,6 @@ config FS_MBCACHE
 source "fs/reiserfs/Kconfig"
 source "fs/jfs/Kconfig"
 
-config FS_POSIX_ACL
-# Posix ACL utility routines (for now, only ext2/ext3/jfs/reiserfs/nfs4)
-#
-# NOTE: you can implement Posix ACLs without these helpers (XFS does).
-# 	Never use this symbol for ifdefs.
-#
-	bool
-	default n
-
 source "fs/xfs/Kconfig"
 source "fs/gfs2/Kconfig"
 source "fs/ocfs2/Kconfig"
@@ -47,6 +38,14 @@ source "fs/nilfs2/Kconfig"
 
 endif # BLOCK
 
+# Posix ACL utility routines
+#
+# Note: Posix ACLs can be implemented without these helpers.  Never use
+# this symbol for ifdefs in core code.
+#
+config FS_POSIX_ACL
+	def_bool n
+
 config EXPORTFS
 	tristate