regmap: sdw: Update misleading comment

In the regmap config reg_bits represents the number of address bits not
the number of value bits. Correct the misleading comment which looks a
lot like it suggests the register value itself is 32-bits wide.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230112171840.2098463-2-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/base/regmap/regmap-sdw.c

@@ -43,7 +43,7 @@ static int regmap_sdw_config_check(const struct regmap_config *config)
 	if (config->val_bits != 8)
 		return -ENOTSUPP;
 
-	/* Registers are 32 bits wide */
+	/* Register addresses are 32 bits wide */
 	if (config->reg_bits != 32)
 		return -ENOTSUPP;