net: encx24j600: 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://lore.kernel.org/r/20240202064336.39138-1-liubo03@inspur.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/ethernet/microchip/encx24j600-regmap.c

@@ -464,7 +464,7 @@ static struct regmap_config regcfg = {
 	.val_bits = 16,
 	.max_register = 0xee,
 	.reg_stride = 2,
-	.cache_type = REGCACHE_RBTREE,
+	.cache_type = REGCACHE_MAPLE,
 	.val_format_endian = REGMAP_ENDIAN_LITTLE,
 	.readable_reg = encx24j600_regmap_readable,
 	.writeable_reg = encx24j600_regmap_writeable,
@@ -485,7 +485,7 @@ static struct regmap_config phycfg = {
 	.reg_bits = 8,
 	.val_bits = 16,
 	.max_register = 0x1f,
-	.cache_type = REGCACHE_RBTREE,
+	.cache_type = REGCACHE_MAPLE,
 	.val_format_endian = REGMAP_ENDIAN_LITTLE,
 	.readable_reg = encx24j600_phymap_readable,
 	.writeable_reg = encx24j600_phymap_writeable,