regmap: Rename n_ranges to num_ranges

This makes things consistent with the rest of the API and is actually what
the documentation says. We don't currently have any in tree users so low
cost.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index e3bcc3f..afc8e1a 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -133,7 +133,7 @@
 	enum regmap_endian val_format_endian;
 
 	const struct regmap_range_cfg *ranges;
-	unsigned int n_ranges;
+	unsigned int num_ranges;
 };
 
 /**