regulator: pf8x00: 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: Bo Liu <liubo03@inspur.com>
Link: https://msgid.link/r/20240320085740.4604-8-liubo03@inspur.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: Bo Liu

drivers/regulator/pf8x00-regulator.c

@@ -142,7 +142,7 @@ static const struct regmap_config pf8x00_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
 	.max_register = PF8X00_PAGE_SELECT,
-	.cache_type = REGCACHE_RBTREE,
+	.cache_type = REGCACHE_MAPLE,
 };
 
 /* VLDOx output: 1.5V to 5.0V */