vfs: Use const for kernel parser table

This is a much better version of a previous patch to make the parser
tables constant. Rather than changing the typedef, we put the "const" in
all the various places where its required, allowing the __initconst
exception for nfsroot which was the cause of the previous trouble.

This was posted for review some time ago and I believe its been in -mm
since then.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Cc: Alexander Viro <aviro@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c
index 690ca7b..2c8b809 100644
--- a/arch/powerpc/platforms/cell/spufs/inode.c
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@@ -659,7 +659,7 @@
 	Opt_uid, Opt_gid, Opt_mode, Opt_debug, Opt_err,
 };
 
-static match_table_t spufs_tokens = {
+static const match_table_t spufs_tokens = {
 	{ Opt_uid,   "uid=%d" },
 	{ Opt_gid,   "gid=%d" },
 	{ Opt_mode,  "mode=%o" },