[IA64] fix build error - arch/ia64/kernel/perfmon.c

arch/ia64/kernel/perfmon.c:621: error: duplicate 'static'

Introduced by commit c74a1cbb3cac348f276fabc381758f5b0b4713b2

    pass default dentry_operations to mount_pseudo()

Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index ac76da0..89accc6 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -618,7 +618,7 @@
 }
 
 /* forward declaration */
-static static const struct dentry_operations pfmfs_dentry_operations;
+static const struct dentry_operations pfmfs_dentry_operations;
 
 static struct dentry *
 pfmfs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data)