regmap: Fix doc comment

Signed-off-by: NDimitris Papastamos <dp@opensource.wolfsonmicro.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

drivers/base/regmap/regcache.c

@@ -292,7 +292,7 @@ EXPORT_SYMBOL_GPL(regcache_cache_only);
  * regcache_cache_bypass: Put a register map into cache bypass mode
  *
  * @map: map to configure
- * @cache_only: flag if changes should not be written to the hardware
+ * @cache_bypass: flag if changes should not be written to the hardware
  *
  * When a register map is marked with the cache bypass option, writes
  * to the register map API will only update the hardware and not the