mfd: tps65128: Convert to use maple tree register cache

The maple tree register cache is based on a much more modern data structure
than the rbtree cache and makes optimisation choices which are probably
more appropriate for modern systems than those made by the rbtree cache.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20231001-mfd-ti-maple-v1-3-0657862de3f6@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>

Author: broonie

drivers/mfd/tps65218.c

@@ -127,7 +127,7 @@ static const struct regmap_access_table tps65218_volatile_table = {
 static const struct regmap_config tps65218_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
-	.cache_type = REGCACHE_RBTREE,
+	.cache_type = REGCACHE_MAPLE,
 	.volatile_table = &tps65218_volatile_table,
 };