maple_tree: goto complete directly on a pivot of 0

maple_tree: goto complete directly on a pivot of 0

When we break the loop after assigning a pivot, the index i/j is not
changed.  Then the following code assign pivot, which means we do the
assignment with same i/j by mas_safe_pivot.

Since the loop condition is (i < piv_end), from which we can get i is less
than mt_pivots[mt].  It implies mas_safe_pivot() return pivot[i] which is
the same value we get in loop.

Now we can conclude it does a redundant assignment on a pivot of 0.  Let's
just go to complete to avoid it.

Link: https://lkml.kernel.org/r/20240911142759.20989-3-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>