samples: net: echo_client: Decrease SRAM for atsamr21_xpro

This update the echo_client configurations for the atsamr21_xpro board
to match same configs defined at echo_server.

Signed-off-by: Gerson Fernando Budke <[email protected]>

samples/net/sockets/echo_client/boards/atsamr21_xpro.conf

@@ -1,23 +1,31 @@
 #
-# Copyright (c) 2020-2021, Gerson Fernando Budke
 # Copyright (c) 2019, Benjamin Valentin
+# Copyright (c) 2020-2023, Gerson Fernando Budke
 #
 # SPDX-License-Identifier: Apache-2.0
 #
 
-# Reduced buffers to fit into SAMR21 SoC
+# Reduced configs to fit into SAMR21 SoC
 CONFIG_CPP=n
 
-CONFIG_NET_PKT_RX_COUNT=6
-CONFIG_NET_PKT_TX_COUNT=6
-CONFIG_NET_BUF_RX_COUNT=6
-CONFIG_NET_BUF_TX_COUNT=6
-CONFIG_NET_MAX_CONTEXTS=4
+CONFIG_NET_PKT_RX_COUNT=5
+CONFIG_NET_PKT_TX_COUNT=5
+CONFIG_NET_BUF_RX_COUNT=5
+CONFIG_NET_BUF_TX_COUNT=5
+CONFIG_NET_MAX_CONTEXTS=2
 CONFIG_NET_MAX_CONN=1
 CONFIG_NET_MAX_ROUTES=1
 CONFIG_NET_MAX_NEXTHOPS=1
 
-CONFIG_SHELL_STACK_SIZE=768
-CONFIG_SHELL_CMD_BUFF_SIZE=64
+CONFIG_SHELL_STACK_SIZE=384
+CONFIG_SHELL_CMD_BUFF_SIZE=16
 CONFIG_SHELL_ARGC_MAX=6
-CONFIG_SHELL_HISTORY_BUFFER=64
+CONFIG_SHELL_HISTORY_BUFFER=4
+
+CONFIG_LOG_MODE_MINIMAL=y
+CONFIG_NET_IP_DSCP_ECN=n
+CONFIG_NET_STATISTICS=n
+CONFIG_NET_MGMT_EVENT_STACK_SIZE=384
+CONFIG_IEEE802154_RF2XX_RX_STACK_SIZE=384
+
+CONFIG_UART_USE_RUNTIME_CONFIGURE=n