snippets: wifi-enterprise: Increase MBEDTLS heap size

With NRF security, higher heap requirement is seen for operating
with RSA-3072 based certificates. Add a NRF SoC specific conf in
snippets to handle this.

Signed-off-by: Ravi Dondaputi <ravi.dondaputi@nordicsemi.no>

Author: rado17

snippets/wifi-enterprise/snippet.yml

@@ -1,3 +1,8 @@
 name: wifi-enterprise
 append:
   EXTRA_CONF_FILE: wifi-enterprise.conf
+
+boards:
+  /.*/nrf.*/cpuapp/:
+    append:
+      EXTRA_CONF_FILE: wifi-enterprise_nrf.conf

snippets/wifi-enterprise/wifi-enterprise_nrf.conf

@@ -0,0 +1,17 @@
+# Enable Wi-Fi enterprise mode
+CONFIG_WIFI_NM_WPA_SUPPLICANT_CRYPTO_ENTERPRISE=y
+# Use variable data size to reduce memory usage for small data packets
+CONFIG_NET_BUF_VARIABLE_DATA_SIZE=y
+# For TLS and X.509 processing MbedTLS needs large heap size and using separate heap
+# for MbedTLS gives us more control over the heap size.
+CONFIG_MBEDTLS_ENABLE_HEAP=y
+CONFIG_MBEDTLS_HEAP_SIZE=75000
+
+# For use with TLS credentials
+CONFIG_TLS_CREDENTIALS_SHELL=y
+CONFIG_BASE64=y
+CONFIG_TLS_CREDENTIALS=y
+CONFIG_TLS_CREDENTIALS_SHELL_CRED_BUF_SIZE=8192
+CONFIG_TLS_MAX_CREDENTIALS_NUMBER=6
+CONFIG_HEAP_MEM_POOL_ADD_SIZE_TLS_CRED_SHELL=9000
+CONFIG_NRF_WIFI_DATA_HEAP_SIZE=100000