samples: wifi: shell: use MBEDTLS_ENABLE_HEAP for RW612

For the latest upstream, if MBEDTLS_ENABLE_HEAP is not enabled, it will
default select MBEDTLS_PSA_STATIC_KEY_SLOTS, and consume extra SRAM for
about 35KB. Therefore, default enable MBEDTLS_ENABLE_HEAP.

Signed-off-by: Maochen Wang <[email protected]>

Author: MaochenWang1

samples/net/wifi/shell/boards/overlay_hostap_rw612.conf

@@ -25,7 +25,9 @@ CONFIG_ENTROPY_GENERATOR=y
 CONFIG_MBEDTLS_PSA_CRYPTO_C=y
 CONFIG_MBEDTLS_ENTROPY_C=y
 CONFIG_MBEDTLS_SSL_MAX_CONTENT_LEN=8192
-CONFIG_COMMON_LIBC_MALLOC_ARENA_SIZE=80000
+# mbedtls heap for enterprise case
+CONFIG_MBEDTLS_ENABLE_HEAP=y
+CONFIG_MBEDTLS_HEAP_SIZE=69952
 
 #priority
 CONFIG_WIFI_NM_WPA_SUPPLICANT_WQ_PRIO=3