regmap: debugfs: Factor out debugfs_tot_len calc into a function
In preparation to support the regmap debugfs ranges functionality factor this code out to a separate function. We'll need to ensure that the value has been correctly calculated from two separate places in the code. Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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