Staging: lustre: Replace non-standard spinlock macro definations

This patch replaces non-standard spin lock macro with standard linux function.

This is done using Coccinelle and semantic patch used is as follows:

@@
expression x;
@@

- TREE_READ_LOCK_IRQ(x)
+ spin_lock_irq(&(x)->tree_lock)

@@
expression x;
@@

- TREE_READ_UNLOCK_IRQ(x)
+ spin_unlock_irq(&(x)->tree_lock)

Also semantic patch result is modified by droping ->,
inner & and adding . for simplification of code.
Signed-off-by: Vaishali Thakkar <vthakkar1994@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/llite/llite_lib.c

@@ -1880,8 +1880,8 @@ void ll_delete_inode(struct inode *inode)
 
 	/* Workaround for LU-118 */
 	if (inode->i_data.nrpages) {
-		TREE_READ_LOCK_IRQ(&inode->i_data);
-		TREE_READ_UNLOCK_IRQ(&inode->i_data);
+		spin_lock_irq(&inode->i_data.tree_lock);
+		spin_unlock_irq(&inode->i_data.tree_lock);
 		LASSERTF(inode->i_data.nrpages == 0,
 			 "inode=%lu/%u(%p) nrpages=%lu, see "
 			 "http://jira.whamcloud.com/browse/LU-118\n",