Clean up CSTYLEDs

69 CSTYLED BEGINs remain, appx. 30 of which can be removed if cstyle(1)
had a useful policy regarding
  CALL(ARG1,
  	ARG2,
  	ARG3);
above 2 lines. As it stands, it spits out *both*
  sysctl_os.c: 385: continuation line should be indented by 4 spaces
  sysctl_os.c: 385: indent by spaces instead of tabs
which is very cool

Another >10 could be fixed by removing "ulong" &al. handling.
I don't foresee anyone actually using it intentionally
(does it even exist in modern headers? why did it in the first place?).

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #12993

module/avl/avl.c

@@ -319,7 +319,6 @@ avl_rotation(avl_tree_t *tree, avl_node_t *node, int balance)
 	int which_child = AVL_XCHILD(node);
 	int child_bal = AVL_XBALANCE(child);
 
-	/* BEGIN CSTYLED */
 	/*
 	 * case 1 : node is overly left heavy, the left child is balanced or
 	 * also left heavy. This requires the following rotation.
@@ -345,7 +344,6 @@ avl_rotation(avl_tree_t *tree, avl_node_t *node, int balance)
 	 * we detect this situation by noting that child's balance is not
 	 * right_heavy.
 	 */
-	/* END CSTYLED */
 	if (child_bal != right_heavy) {
 
 		/*
@@ -388,7 +386,6 @@ avl_rotation(avl_tree_t *tree, avl_node_t *node, int balance)
 		return (child_bal == 0);
 	}
 
-	/* BEGIN CSTYLED */
 	/*
 	 * case 2 : When node is left heavy, but child is right heavy we use
 	 * a different rotation.
@@ -420,7 +417,6 @@ avl_rotation(avl_tree_t *tree, avl_node_t *node, int balance)
 	 *	 if gchild was right_heavy, then child is now left heavy
 	 *		else it is balanced
 	 */
-	/* END CSTYLED */
 	gchild = child->avl_child[right];
 	gleft = gchild->avl_child[left];
 	gright = gchild->avl_child[right];