Revert "[nrf fromlist] wifi: Move Wi-Fi enterprise configs to a snippet"

This reverts commit e6d8fe1.

Signed-off-by: Chaitanya Tata <[email protected]>

Author: krish2718

doc/connectivity/networking/api/wifi.rst

@@ -50,7 +50,14 @@ module.
     $ cp client2.pem samples/net/wifi/test_certs/
     $ cp client-key2.pem samples/net/wifi/test_certs/
     $ cp ca2.pem samples/net/wifi/test_certs/
-    $ west build -p -b <board> samples/net/wifi -S wifi-enterprise
+    $ west build -p -b <board> samples/net/wifi -- -DEXTRA_CONF_FILE=overlay-enterprise.conf
+
+For using variable size network buffer, the following overlay file can be used:
+
+.. code-block:: bash
+
+    $ west build -p -b <board> samples/net/wifi -- -DEXTRA_CONF_FILE=overlay-enterprise-variable-bufs.conf
+
 
 Run time certificates
 ---------------------

snippets/wifi-enterprise/wifi-enterprise.conf renamed to samples/net/wifi/shell/overlay-enterprise-variable-bufs.conf

@@ -1,8 +1,9 @@
-# Enable Wi-Fi enterprise mode
 CONFIG_WIFI_NM_WPA_SUPPLICANT_CRYPTO_ENTERPRISE=y
+# EAP frames are ~1100 bytes, so, for efficiency, we set the data size to 1100
+CONFIG_NET_BUF_DATA_SIZE=1100
 # 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=60000
+CONFIG_MBEDTLS_HEAP_SIZE=55000

samples/net/wifi/shell/overlay-enterprise.conf

@@ -0,0 +1,10 @@
+CONFIG_WIFI_NM_WPA_SUPPLICANT_CRYPTO_ENTERPRISE=y
+# EAP frames are ~1100 bytes, so, need higher packet counts as default packet size is 128
+CONFIG_NET_PKT_TX_COUNT=36
+CONFIG_NET_PKT_RX_COUNT=36
+CONFIG_NET_BUF_TX_COUNT=72
+CONFIG_NET_BUF_RX_COUNT=36
+# 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=60000