[NXP] Fix mDNS issue with RW61x ethernet board (#36123)

Noticing that mDNS resolution from the controller
is failing some time after the board is commissioned.
This is due to the board not responding to the mDNS queries.
diff --git a/config/nxp/chip-module/Kconfig.defaults b/config/nxp/chip-module/Kconfig.defaults
index 3d0fcf0..cd2dd74 100644
--- a/config/nxp/chip-module/Kconfig.defaults
+++ b/config/nxp/chip-module/Kconfig.defaults
@@ -336,6 +336,9 @@
 	default ETH_NXP_ENET
 endchoice
 
+config NET_SOCKETS_POLL_MAX
+	default 7
+
 endif
 
 # Configure MBEDTLS lib
diff --git a/config/nxp/chip-module/Kconfig.features b/config/nxp/chip-module/Kconfig.features
index 9c388a2..50f72eb 100644
--- a/config/nxp/chip-module/Kconfig.features
+++ b/config/nxp/chip-module/Kconfig.features
@@ -95,6 +95,8 @@
 	select NET_TCP
 	select DNS_RESOLVER
 	select MDNS_RESOLVER
+	select MDNS_RESPONDER
+	select DNS_SD
 	select MBEDTLS_PKCS5_C
 	select MBEDTLS_HKDF_C
 	select MBEDTLS_ECDSA_C