nfs: count correct array for mnt3_counts array size

Array size of mnt3_counts should be the size of array
mnt3_procedures, not mnt_procedures, though they're same in size
right now. Found this by code inspection.

Fixes: 1c5876ddbd ("sunrpc: move p_count out of struct rpc_procinfo")
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Eryu Guan <eguan@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

fs/nfs/mount_clnt.c

@@ -512,7 +512,7 @@ static const struct rpc_version mnt_version1 = {
 	.counts		= mnt_counts,
 };
 
-static unsigned int mnt3_counts[ARRAY_SIZE(mnt_procedures)];
+static unsigned int mnt3_counts[ARRAY_SIZE(mnt3_procedures)];
 static const struct rpc_version mnt_version3 = {
 	.number		= 3,
 	.nrprocs	= ARRAY_SIZE(mnt3_procedures),