usb: typec: stusb160x: 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>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20240309071757.3152-1-liubo03@inspur.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/typec/stusb160x.c

@@ -234,7 +234,7 @@ static const struct regmap_config stusb1600_regmap_config = {
 	.readable_reg	= stusb160x_reg_readable,
 	.volatile_reg	= stusb160x_reg_volatile,
 	.precious_reg	= stusb160x_reg_precious,
-	.cache_type	= REGCACHE_RBTREE,
+	.cache_type	= REGCACHE_MAPLE,
 };
 
 static bool stusb160x_get_vconn(struct stusb160x *chip)