net: lwm2m: enable SenML CBOR

With LwM2M v1.1 SenML CBOR is preferred over SenML JSON.

TLV is on by default only with v1.0.

Signed-off-by: Veijo Pesonen <veijo.pesonen@nordicsemi.no>
diff --git a/samples/net/lwm2m_client/overlay-lwm2m-1.1.conf b/samples/net/lwm2m_client/overlay-lwm2m-1.1.conf
index 0cfeaaa..b959159 100644
--- a/samples/net/lwm2m_client/overlay-lwm2m-1.1.conf
+++ b/samples/net/lwm2m_client/overlay-lwm2m-1.1.conf
@@ -1,3 +1,4 @@
 CONFIG_LWM2M_VERSION_1_1=y
-CONFIG_LWM2M_RW_SENML_JSON_SUPPORT=y
-CONFIG_BASE64=y
+CONFIG_LWM2M_RW_SENML_CBOR_SUPPORT=y
+CONFIG_ZCBOR=y
+CONFIG_ZCBOR_CANONICAL=y