samples: wifi: promiscuous: Increase RX data pool size

Increase RX data pool to fix data buffer allocation failures.

Fixes SHEL-3917.

Signed-off-by: Triveni Danda <[email protected]>

Author: D-Triveni

samples/wifi/promiscuous/prj.conf

@@ -58,6 +58,7 @@ CONFIG_NET_SOCKETS_POLL_MAX=10
 CONFIG_MAIN_STACK_SIZE=5200
 CONFIG_NET_TX_STACK_SIZE=4096
 CONFIG_NET_RX_STACK_SIZE=4096
+CONFIG_NET_PKT_BUF_RX_DATA_POOL_SIZE=20000
 
 # Debugging
 CONFIG_STACK_SENTINEL=y