hwmon: (tmp108) Use maple tree register cache

The tmp108 is only capable of performing single register read and write
operations which means it gains no advantage from using a rbtree register
cache, convert it to using the more modern maple tree register cache
instead. This should be more efficient.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230609-hwmon-maple-v1-4-8edacce86b28@kernel.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Author: broonie

drivers/hwmon/tmp108.c

@@ -318,7 +318,7 @@ static const struct regmap_config tmp108_regmap_config = {
 	.writeable_reg = tmp108_is_writeable_reg,
 	.volatile_reg = tmp108_is_volatile_reg,
 	.val_format_endian = REGMAP_ENDIAN_BIG,
-	.cache_type = REGCACHE_RBTREE,
+	.cache_type = REGCACHE_MAPLE,
 	.use_single_read = true,
 	.use_single_write = true,
 };