samples: net: echo_server: Decrease buffer for atsamr21_xpro

From 2.4 to 2.7 the net samples pair echo-server/client increase the
SRAM requirements. This adjusts example features to free necessary SRAM
to run example.

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

Author: nandojve

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

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2020, Gerson Fernando Budke
+# Copyright (c) 2020-2021, Gerson Fernando Budke
 # Copyright (c) 2019, Benjamin Valentin
 #
 # SPDX-License-Identifier: Apache-2.0
@@ -15,11 +15,11 @@ 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_MAX_CONN=2
-CONFIG_NET_MAX_ROUTES=2
-CONFIG_NET_MAX_NEXTHOPS=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=80
+CONFIG_SHELL_CMD_BUFF_SIZE=64
 CONFIG_SHELL_ARGC_MAX=6
 CONFIG_SHELL_HISTORY_BUFFER=64

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

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2020, Gerson Fernando Budke
+# Copyright (c) 2020-2021, Gerson Fernando Budke
 # Copyright (c) 2019, Benjamin Valentin
 #
 # SPDX-License-Identifier: Apache-2.0
@@ -15,11 +15,11 @@ 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_MAX_CONN=2
-CONFIG_NET_MAX_ROUTES=2
-CONFIG_NET_MAX_NEXTHOPS=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=80
+CONFIG_SHELL_CMD_BUFF_SIZE=64
 CONFIG_SHELL_ARGC_MAX=6
 CONFIG_SHELL_HISTORY_BUFFER=64