cls_flower: Convert to idr_alloc_u32
Use the new helper which saves a temporary variable and a few lines
of code.
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
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Use the new helper which saves a temporary variable and a few lines
of code.
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>